Cell Biology and Biodiversity

Cell Structure and Specialisation - Differences between light and electron microscope

By the end of the lesson, the learner should be able to:

- Differentiate between light and electron microscope based on structure and function
- Describe the concepts of resolution and magnification in microscopy
- Relate the use of microscopes to real life applications such as how hospital laboratories use microscopes to examine blood samples for diagnosing diseases like malaria

In groups, learners are guided to:

- Use print and non-print media to search for information on structural and functional differences between light and electron microscope
- Discuss differences in magnification power, resolving power, illumination, lenses, staining, specimen state and specimen mounting
- Present discussion points in class

How do light and electron microscopes differ?

- Distinction Biology Learner's Book Grade 10 pg. 39
- Light microscope
- Charts of electron microscope
- Digital resources

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Cell Structure and Specialisation - Preparation of temporary slides

By the end of the lesson, the learner should be able to:

- Describe the processes of sectioning, fixation, staining and mounting during slide preparation
- Prepare a temporary slide of an onion epidermal cell for observation under a light microscope
- Relate slide preparation skills to real life laboratory work such as how medical lab technologists prepare tissue samples for disease diagnosis

In groups, learners are guided to:

- Discuss the meaning and importance of sectioning, fixation, staining and mounting
- Carry out a practical activity to prepare a temporary slide of an onion epidermal cell
- Observe the prepared slide under a light microscope

How are temporary slides prepared for observation?

- Distinction Biology Learner's Book Grade 10 pg. 41
- Light microscope, slides, cover slips
- Onion bulb, iodine solution, scalpel, forceps, ethanol

- Oral questions - Observation - Practical assessment

Cell Biology and Biodiversity

Cell Structure and Specialisation - Estimation of cell size during microscopy
Cell Structure and Specialisation - Plant and animal cell structure under the electron microscope

By the end of the lesson, the learner should be able to:

- Estimate cell size using a light microscope and a transparent ruler
- Calculate the length of a cell using the formula relating diameter of field of view to number of cells
- Relate cell size estimation to real life situations such as how scientists determine cell growth in medical research and cancer diagnosis

- Describe the structure of plant and animal cells as observed under an electron microscope
- Draw and label the structure of plant and animal cells as seen under an electron microscope
- Connect the study of cell structure to real life examples such as how understanding cell membranes helps in developing medicines that target specific cells

In groups, learners are guided to:

- Place a transparent ruler on the stage of the light microscope and measure the diameter of the field of view
- Count the number of cells across the diameter of the field of view
- Calculate the length of one cell using the formula and convert measurements from millimetres to micrometres

- Use photomicrographs and charts to compare the structure of plant and animal cells as seen under electron microscope
- Draw and label the structure of plant and animal cells and share with peers
- Discuss the structural differences between plant and animal cells

How is cell size estimated using a light microscope?
Why do plant and animal cells differ?

- Distinction Biology Learner's Book Grade 10 pg. 44
- Light microscope
- Transparent ruler
- Prepared slide of onion epidermal cell

- Distinction Biology Learner's Book Grade 10 pg. 47
- Photomicrographs and charts of plant and animal cells
- Digital resources

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Cell Structure and Specialisation - Structures and functions of cell organelles

By the end of the lesson, the learner should be able to:

- Describe the functions of cell structures including cell membrane, cytoplasm, nucleus, mitochondria, endoplasmic reticulum, ribosomes, Golgi apparatus and lysosomes
- Relate cell structures to their functions in plant and animal cells
- Connect cell organelle functions to real life examples such as how mitochondria provide energy for muscle contraction during exercise

In groups, learners are guided to:

- Use reference materials to search for information on the functions of structures in plant and animal cells
- Discuss the functions of cell wall, chloroplast, vacuole, centriole and other organelles
- Identify cell structures from their descriptions

How do the structures in plant and animal cells function?

- Distinction Biology Learner's Book Grade 10 pg. 50
- Charts and photomicrographs
- Digital resources

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Cell Structure and Specialisation - Modelling plant and animal cells as seen under the electron microscope

By the end of the lesson, the learner should be able to:

- Model the structure of plant and animal cells as seen under the electron microscope using locally available materials
- Identify cell organelles represented in the models
- Relate modelling skills to real life applications such as how scientists build models to study complex biological structures and develop new treatments

In groups, learners are guided to:

- Use locally available materials such as carton box, modelling clay, beans, beads and balloons to model the structure of plant and animal cells
- Label the cell components using paper strips attached to toothpicks
- Display and discuss the models for peer assessment

How can plant and animal cell structures be modelled?

- Distinction Biology Learner's Book Grade 10 pg. 55
- Carton box, modelling clay, beans, beads
- Balloons, glue, scissors, water colours

- Oral questions - Observation - Practical assessment

Cell Biology and Biodiversity

Cell Structure and Specialisation - Specialised cells in plants

By the end of the lesson, the learner should be able to:

- Describe the structure and function of specialised cells in plants including root hair cells, palisade cells, guard cells and pollen grains
- Relate the structures of specialised plant cells to their functions
- Connect plant cell specialisation to real life examples such as how root hairs help plants absorb water during drought and how guard cells control water loss in hot weather

In groups, learners are guided to:

- Use photomicrographs and permanent slides to observe specialised plant cells
- Discuss the adaptations of root hair cells, palisade cells, guard cells and pollen grains to their functions
- Draw and label specialised plant cells

How are cells specialised in plants?

- Distinction Biology Learner's Book Grade 10 pg. 59
- Photomicrographs of specialised plant cells
- Charts and diagrams
- Digital resources

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Cell Structure and Specialisation - Specialised cells in animals
Cell Structure and Specialisation - Cell organisation: Organelles, cells and tissues

By the end of the lesson, the learner should be able to:

- Describe the structure and function of specialised cells in animals including muscle cells, nerve cells, red and white blood cells and reproductive cells
- Relate the structures of specialised animal cells to their functions
- Connect animal cell specialisation to real life examples such as how red blood cells transport oxygen during physical activities and how white blood cells fight infections when one falls sick

- Describe the levels of cell organisation from organelles to cells to tissues
- Identify examples of tissues in plants and animals
- Connect cell organisation to real life examples such as how muscle tissues work together to enable body movement during sports and daily activities

In groups, learners are guided to:

- Use reference materials to search for information on specialised cells in animals
- Discuss the adaptations of muscle cells, nerve cells, blood cells, sperm cells and ovum to their functions
- Draw and label specialised animal cells and share with peers

- Use digital devices to search for information on levels of cell organisation
- Discuss the hierarchy of cell organisation: organelles, cells, tissues, organs, organ systems and organism
- Identify and discuss examples of tissues in plants and animals including palisade tissue, blood tissue, skeletal muscle tissue and epithelial tissue

How are cells specialised in animals?
How are cells organised in living organisms?

- Distinction Biology Learner's Book Grade 10 pg. 61
- Photomicrographs of specialised animal cells
- Charts and diagrams
- Digital resources

- Distinction Biology Learner's Book Grade 10 pg. 64
- Charts and diagrams
- Digital resources

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Cell Structure and Specialisation - Cell organisation: Organs and organ systems

By the end of the lesson, the learner should be able to:

- Describe organs and organ systems in plants and animals
- Explain the interrelationship between organs within an organ system
- Connect organ systems to real life examples such as how the digestive system processes food eaten daily and how the circulatory system transports nutrients and oxygen throughout the body

In groups, learners are guided to:

- Discuss examples of organs in plants and animals including roots, leaves, heart, lungs and kidneys
- Discuss organ systems in plants and animals including root system, shoot system, vascular system, digestive system, circulatory system and respiratory system
- Fill in tables identifying organ systems and their component organs

How do organs and organ systems function in living organisms?

- Distinction Biology Learner's Book Grade 10 pg. 66
- Charts and diagrams
- Digital resources

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Cell Structure and Specialisation - Differences between plant and animal cells

By the end of the lesson, the learner should be able to:

- Compare and contrast plant and animal cells as seen under the electron microscope
- Summarise the key differences in a table format
- Connect the differences between plant and animal cells to real life observations such as why plants have rigid shapes due to cell walls while animal bodies are flexible

In groups, learners are guided to:

- Discuss differences between plant and animal cells including cell wall, chloroplast, vacuole, centriole and shape
- Complete comparison tables identifying structures present in plant and animal cells
- Attempt revision questions on cell structure and specialisation

What are the key differences between plant and animal cells?

- Distinction Biology Learner's Book Grade 10 pg. 47
- Charts and photomicrographs
- Digital resources

- Oral questions - Written tests - Observation

Cell Biology and Biodiversity

Cell Structure and Specialisation - Differences between plant and animal cells

By the end of the lesson, the learner should be able to:

- Compare and contrast plant and animal cells as seen under the electron microscope
- Summarise the key differences in a table format
- Connect the differences between plant and animal cells to real life observations such as why plants have rigid shapes due to cell walls while animal bodies are flexible

In groups, learners are guided to:

- Discuss differences between plant and animal cells including cell wall, chloroplast, vacuole, centriole and shape
- Complete comparison tables identifying structures present in plant and animal cells
- Attempt revision questions on cell structure and specialisation

What are the key differences between plant and animal cells?

- Distinction Biology Learner's Book Grade 10 pg. 47
- Charts and photomicrographs
- Digital resources

- Oral questions - Written tests - Observation

Cell Biology and Biodiversity

Cell Structure and Specialisation - Differences between plant and animal cells

By the end of the lesson, the learner should be able to:

- Compare and contrast plant and animal cells as seen under the electron microscope
- Summarise the key differences in a table format
- Connect the differences between plant and animal cells to real life observations such as why plants have rigid shapes due to cell walls while animal bodies are flexible

In groups, learners are guided to:

- Discuss differences between plant and animal cells including cell wall, chloroplast, vacuole, centriole and shape
- Complete comparison tables identifying structures present in plant and animal cells
- Attempt revision questions on cell structure and specialisation

What are the key differences between plant and animal cells?

- Distinction Biology Learner's Book Grade 10 pg. 47
- Charts and photomicrographs
- Digital resources

- Oral questions - Written tests - Observation

Cell Biology and Biodiversity

Cell Structure and Specialisation - The cell as the basic unit of life

By the end of the lesson, the learner should be able to:

- Explain the importance of the cell as the basic unit of life
- Summarise the structure, functions and organisation of cells in living organisms
- Connect the concept of cells as building blocks of life to real life examples such as how wound healing involves cell division and how growth results from increase in number of cells

In groups, learners are guided to:

- Discuss the importance of cells as basic units of life in living organisms
- Summarise content on cell structure, specialisation and organisation
- Attempt assessment questions on cell structure and specialisation

Why is the cell considered the basic unit of life?

- Distinction Biology Learner's Book Grade 10 pg. 39
- Charts and diagrams
- Digital resources

- Written tests - Oral questions - Observation

Cell Biology and Biodiversity

Cell Structure and Specialisation - The cell as the basic unit of life

By the end of the lesson, the learner should be able to:

- Explain the importance of the cell as the basic unit of life
- Summarise the structure, functions and organisation of cells in living organisms
- Connect the concept of cells as building blocks of life to real life examples such as how wound healing involves cell division and how growth results from increase in number of cells

In groups, learners are guided to:

- Discuss the importance of cells as basic units of life in living organisms
- Summarise content on cell structure, specialisation and organisation
- Attempt assessment questions on cell structure and specialisation

Why is the cell considered the basic unit of life?

- Distinction Biology Learner's Book Grade 10 pg. 39
- Charts and diagrams
- Digital resources

- Written tests - Oral questions - Observation

Cell Biology and Biodiversity

Cell Structure and Specialisation - The cell as the basic unit of life
Chemicals of Life - Composition, properties and functions of carbohydrates (Monosaccharides)

By the end of the lesson, the learner should be able to:

- Explain the importance of the cell as the basic unit of life
- Summarise the structure, functions and organisation of cells in living organisms
- Connect the concept of cells as building blocks of life to real life examples such as how wound healing involves cell division and how growth results from increase in number of cells

- Describe the composition, properties and functions of monosaccharides as a class of carbohydrates
- Identify examples of monosaccharides including glucose, fructose and galactose
- Connect knowledge of monosaccharides to real life examples such as why ripe fruits taste sweet and why glucose is used as a quick source of energy in hospitals

In groups, learners are guided to:

- Discuss the importance of cells as basic units of life in living organisms
- Summarise content on cell structure, specialisation and organisation
- Attempt assessment questions on cell structure and specialisation

- Search for information on the composition and general formula of carbohydrates
- Discuss the composition, properties and examples of monosaccharides
- Carry out activities to observe properties of monosaccharides including sweet taste, solubility in water and crystallisation

Why is the cell considered the basic unit of life?
How are carbohydrates important in cells?

- Distinction Biology Learner's Book Grade 10 pg. 39
- Charts and diagrams
- Digital resources

- Distinction Biology Learner's Book Grade 10 pg. 68
- Glucose, ripe fruits, distilled water
- Beakers, stirring rod

- Written tests - Oral questions - Observation
- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Chemicals of Life - Composition, properties and functions of carbohydrates (Disaccharides and polysaccharides)

By the end of the lesson, the learner should be able to:

- Describe the composition, properties and functions of disaccharides and polysaccharides
- Differentiate between monosaccharides, disaccharides and polysaccharides
- Connect knowledge of carbohydrates to real life examples such as why sugarcane juice is sweet, why cooked rice provides energy and how chitin protects insects

In groups, learners are guided to:

- Discuss the composition, examples and properties of disaccharides including maltose, sucrose and lactose
- Discuss the composition, examples and properties of polysaccharides including starch, glycogen, cellulose and chitin
- Discuss the functions of carbohydrates in living organisms

What are the different classes of carbohydrates?

- Distinction Biology Learner's Book Grade 10 pg. 72
- Sugarcane juice
- Digital resources

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Chemicals of Life - Investigating the presence of carbohydrates in food substances

By the end of the lesson, the learner should be able to:

- Investigate the presence of starch using iodine solution test
- Investigate the presence of reducing and non-reducing sugars using Benedict's solution
- Relate food testing to real life situations such as how food scientists test food products for quality control and nutritional labelling

In groups, learners are guided to:

- Carry out a practical activity to test for the presence of starch using iodine solution
- Carry out a practical activity to test for reducing sugars using Benedict's solution
- Carry out a practical activity to test for non-reducing sugars using hydrochloric acid and Benedict's solution

How is the presence of carbohydrates in food determined?

- Distinction Biology Learner's Book Grade 10 pg. 76
- Iodine solution, Benedict's solution, dilute HCl, NaOH
- Test tubes, hot water bath, food samples

- Oral questions - Observation - Practical assessment

Cell Biology and Biodiversity

Chemicals of Life - Composition, properties and functions of proteins

By the end of the lesson, the learner should be able to:

- Describe the composition, properties and functions of proteins
- Investigate the presence of proteins in food substances using the Biuret test
- Relate knowledge of proteins to real life examples such as why eggs and beans are recommended for body building and why high fever can be dangerous as it denatures body proteins

In groups, learners are guided to:

- Discuss the composition of proteins including carbon, hydrogen, oxygen, nitrogen and sulphur
- Discuss properties of proteins including amphoteric nature, denaturation and hydrolysis
- Carry out a practical activity to test for the presence of proteins using the Biuret test

How are proteins important in living organisms?

- Distinction Biology Learner's Book Grade 10 pg. 81
- Egg white, sodium hydroxide, copper (II) sulphate
- Test tubes, measuring cylinder

- Oral questions - Observation - Practical assessment

Cell Biology and Biodiversity

Chemicals of Life - Composition, properties and functions of lipids
Chemicals of Life - Composition, properties and functions of vitamins

By the end of the lesson, the learner should be able to:

- Describe the composition, properties and functions of lipids
- Investigate the presence of lipids in food substances using the emulsion test and grease spot test
- Relate knowledge of lipids to real life examples such as why cooking oil is used for frying food, why whales have thick fat layers for insulation and why oily foods leave grease marks on paper

- Describe the properties, sources, functions and deficiency symptoms of vitamins A, B complex, C, D, E and K
- Investigate the presence of vitamin C in food substances using DCPIP solution
- Relate vitamin knowledge to real life examples such as why eating fresh fruits prevents scurvy, why carrots improve night vision and why sunlight exposure helps strengthen bones

In groups, learners are guided to:

- Discuss the composition of lipids including fatty acids and glycerol joined by ester bonds
- Discuss properties and functions of lipids in living organisms
- Carry out emulsion test and grease spot test to investigate the presence of lipids in food substances

- Use reference materials to search for information on the properties, sources and functions of vitamins
- Discuss the classification of vitamins into water-soluble and fat-soluble vitamins
- Carry out a practical activity to test for the presence of vitamin C using DCPIP solution

How is the presence of lipids in food determined?
What is the role of vitamins in the body?

- Distinction Biology Learner's Book Grade 10 pg. 85
- Cooking oil, ethanol, distilled water, filter paper
- Test tubes, measuring cylinder

- Distinction Biology Learner's Book Grade 10 pg. 91
- DCPIP solution, lemon juice, test tubes
- Measuring cylinder, dropper

- Oral questions - Observation - Practical assessment

Cell Biology and Biodiversity

Chemicals of Life - Enzymes: Meaning and properties of enzymes

By the end of the lesson, the learner should be able to:

- Define enzymes and explain their role as biological catalysts
- Describe the properties of enzymes including specificity, reusability and protein nature
- Relate enzyme function to real life examples such as how saliva breaks down starch in the mouth during digestion and how enzyme-based detergents remove stains from clothes

In groups, learners are guided to:

- Use print and non-print media to search for the meaning of enzymes
- Discuss the naming of enzymes based on their substrates
- Discuss the properties of enzymes including their protein nature, specificity, reusability and sensitivity to temperature and pH

What are enzymes and how do they function?

- Distinction Biology Learner's Book Grade 10 pg. 94
- Digital resources
- Internet access

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Chemicals of Life - Investigating the presence of catalase enzymes in living tissues

By the end of the lesson, the learner should be able to:

- Investigate the presence of catalase enzymes in living tissues using hydrogen peroxide
- Explain why boiled tissues do not show enzyme activity
- Relate enzyme catalase to real life examples such as how the body breaks down harmful hydrogen peroxide produced during metabolism to keep cells healthy

In groups, learners are guided to:

- Carry out a practical activity to investigate the presence of catalase in fresh and boiled plant or animal tissue using hydrogen peroxide
- Introduce a glowing splint to test for the presence of oxygen produced
- Discuss findings and draw conclusions on the presence of enzymes in living tissues

How can the presence of enzymes in living tissues be demonstrated?

- Distinction Biology Learner's Book Grade 10 pg. 96
- Fresh and boiled potato or liver, hydrogen peroxide
- Test tubes, wooden splint, scalpel

- Oral questions - Observation - Practical assessment

Cell Biology and Biodiversity

Chemicals of Life - Factors affecting enzyme activity: Temperature and pH

By the end of the lesson, the learner should be able to:

- Determine the effect of temperature on enzyme activity through experiments
- Determine the effect of pH on enzyme activity through experiments
- Relate factors affecting enzymes to real life examples such as why food is stored in refrigerators to slow spoilage and why the stomach produces acid for digestion by pepsin

In groups, learners are guided to:

- Carry out a practical activity to investigate the effect of temperature on enzyme activity using amylase and starch solution at different temperatures
- Carry out a practical activity to investigate the effect of pH on enzyme activity using pepsin and egg albumen
- Draw graphs showing the effect of temperature and pH on enzyme activity

How do temperature and pH affect enzyme activity?

- Distinction Biology Learner's Book Grade 10 pg. 98
- Amylase, starch solution, iodine solution, pepsin
- Water baths, HCl, NaOH, test tubes, thermometer

- Oral questions - Observation - Practical assessment

Cell Biology and Biodiversity

Chemicals of Life - Factors affecting enzyme activity: Substrate and enzyme concentration

By the end of the lesson, the learner should be able to:

- Determine the effect of substrate concentration on enzyme activity through experiments
- Determine the effect of enzyme concentration on enzyme activity through experiments
- Relate substrate and enzyme concentration to real life examples such as why adding more yeast speeds up dough rising in baking and how enzyme inhibitors in pesticides control pests

In groups, learners are guided to:

- Carry out a practical activity to investigate the effect of substrate concentration on enzyme activity using hydrogen peroxide at different concentrations
- Carry out a practical activity to investigate the effect of enzyme concentration using pepsin at different concentrations
- Discuss enzyme inhibitors, cofactors and co-enzymes

How do substrate and enzyme concentration affect enzyme activity?

- Distinction Biology Learner's Book Grade 10 pg. 102
- Hydrogen peroxide at different concentrations, potato or liver
- Pepsin, egg white, HCl, test tubes, water bath

- Oral questions - Observation - Practical assessment

Cell Biology and Biodiversity

Chemicals of Life - Factors affecting enzyme activity: Substrate and enzyme concentration

By the end of the lesson, the learner should be able to:

- Determine the effect of substrate concentration on enzyme activity through experiments
- Determine the effect of enzyme concentration on enzyme activity through experiments
- Relate substrate and enzyme concentration to real life examples such as why adding more yeast speeds up dough rising in baking and how enzyme inhibitors in pesticides control pests

In groups, learners are guided to:

- Carry out a practical activity to investigate the effect of substrate concentration on enzyme activity using hydrogen peroxide at different concentrations
- Carry out a practical activity to investigate the effect of enzyme concentration using pepsin at different concentrations
- Discuss enzyme inhibitors, cofactors and co-enzymes

How do substrate and enzyme concentration affect enzyme activity?

- Distinction Biology Learner's Book Grade 10 pg. 102
- Hydrogen peroxide at different concentrations, potato or liver
- Pepsin, egg white, HCl, test tubes, water bath

- Oral questions - Observation - Practical assessment

Cell Biology and Biodiversity

Chemicals of Life - Functions of water and mineral salts

By the end of the lesson, the learner should be able to:

- Describe the functions of water in living organisms
- Describe the sources and functions of mineral salts in living organisms
- Relate functions of water and mineral salts to real life examples such as why drinking water is essential for body temperature regulation, why iron-rich foods prevent anaemia and why calcium is important for strong bones and teeth

In groups, learners are guided to:

- Use print and non-print media to search for information on the functions of water in living organisms
- Discuss the functions of water including medium for chemical reactions, transport, temperature regulation, excretion and solvent
- Discuss sources and functions of mineral salts including calcium, iron, iodine, phosphorus and sodium

Why are water and mineral salts important in living organisms?

- Distinction Biology Learner's Book Grade 10 pg. 104
- Charts showing sources of mineral salts
- Digital resources

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Chemicals of Life - Functions of water and mineral salts

By the end of the lesson, the learner should be able to:

- Describe the functions of water in living organisms
- Describe the sources and functions of mineral salts in living organisms
- Relate functions of water and mineral salts to real life examples such as why drinking water is essential for body temperature regulation, why iron-rich foods prevent anaemia and why calcium is important for strong bones and teeth

In groups, learners are guided to:

- Use print and non-print media to search for information on the functions of water in living organisms
- Discuss the functions of water including medium for chemical reactions, transport, temperature regulation, excretion and solvent
- Discuss sources and functions of mineral salts including calcium, iron, iodine, phosphorus and sodium

Why are water and mineral salts important in living organisms?

- Distinction Biology Learner's Book Grade 10 pg. 104
- Charts showing sources of mineral salts
- Digital resources

- Oral questions - Observation - Written assignments

Cell Biology and Biodiversity

Chemicals of Life - Importance of chemical components in cells

By the end of the lesson, the learner should be able to:

- Examine packaging labels of common food products to identify chemical components, preservatives, colourings and expiry dates
- Explain the importance of chemical components in cells for growth, energy production and life processes
- Relate food labelling to real life consumer decisions such as checking expiry dates before buying food and reading nutritional information to make healthy dietary choices

In groups, learners are guided to:

- Examine packaging labels of common food products such as mineral water, salt, flour and cooking oil
- Identify the quality marks, preservatives, colourings, date of manufacture and expiry on the labels
- Discuss the importance of knowing the chemical components in food substances for health and safety

Why is it important to know the chemical components in food products?

- Distinction Biology Learner's Book Grade 10 pg. 106
- Packaging labels of common food products
- Digital resources

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Nutrition - Types of nutrition in plants (Autotrophism and Heterotrophism)

By the end of the lesson, the learner should be able to:

- Describe the meaning of autotrophism and heterotrophism in plants
- Classify plants according to their mode of nutrition
- Recognise that plants in the local environment use different strategies to obtain nutrients

In groups, learners are guided to:
- Search for information from print and non-print media on the types of nutrition in plants and share with peers
- Study pictures showing autotrophic and heterotrophic plants and identify their modes of nutrition
- Discuss the meaning of autotrophism and heterotrophism with classmates

How do plants obtain nutrients from their environment?

- Distinction Biology Learner's Book Grade 10 pg. 107
- Digital resources
- Charts showing autotrophic and heterotrophic plants

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Nutrition - Parasitism as a mode of nutrition in plants

By the end of the lesson, the learner should be able to:

- Explain parasitism as a mode of heterotrophic nutrition in plants
- Distinguish between full and partial parasitic plants
- Identify parasitic plants in the local environment and explain their impact on host plants

In groups, learners are guided to:
- Brainstorm on the meaning of parasitism as a mode of nutrition in heterotrophic plants
- Study pictures of parasitic plants and describe how they depend on host plants for survival
- Discuss examples of parasitic plants in the local environment

How do parasitic plants obtain nutrients from their host?

- Distinction Biology Learner's Book Grade 10 pg. 109
- Digital resources
- Pictures of parasitic plants

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Nutrition - Saprophytic, symbiotic and insectivorous modes of nutrition

By the end of the lesson, the learner should be able to:

- Describe saprophytic, symbiotic and insectivorous modes of nutrition in plants
- Compare and contrast the different heterotrophic modes of nutrition
- Relate the survival strategies of insectivorous plants to nutrient-deficient habitats such as swamps

In groups, learners are guided to:
- Search for information on saprophytic, symbiotic and insectivorous modes of nutrition using print and non-print media
- Study pictures of venus flytrap and pitcher plants and discuss how they trap insects
- Discuss the nutrients obtained by insectivorous plants from insects

Why do some plants trap and digest insects?

- Distinction Biology Learner's Book Grade 10 pg. 110
- Digital resources
- Pictures/charts of insectivorous plants

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Structure of the chloroplast
Nutrition - Function of the chloroplast in plants

By the end of the lesson, the learner should be able to:

- Describe the structure of the chloroplast
- Draw and label the parts of the chloroplast
- Connect the presence of chloroplasts in green leaves to why plants appear green and manufacture food

- Relate the structure of the chloroplast to its function in plant cells
- Explain the role of chlorophyll, grana and stroma in photosynthesis
- Link the abundance of chloroplasts in palisade cells to why the upper leaf surface is the main site for food manufacture

In groups, learners are guided to:
- Observe a drawing of a chloroplast and identify the parts (stroma, grana, lamellae, inner and outer membranes)
- Draw and label the structure of the chloroplast in exercise books
- Exchange exercise books and respectfully comment on each other's drawings
- Discuss the structure of the chloroplast in relation to its function (chlorophyll traps light, grana provide large surface area, stroma has enzymes)
- Use reference materials to search for information on the function of chloroplast in plants

What is the structure of the chloroplast?
How does the structure of the chloroplast enable it to carry out its function?

- Distinction Biology Learner's Book Grade 10 pg. 112
- Digital resources
- Charts/diagrams of chloroplast structure
- Distinction Biology Learner's Book Grade 10 pg. 113
- Digital resources
- Internet access

- Observation - Oral questions - Written assignments
- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - The process of photosynthesis

By the end of the lesson, the learner should be able to:

- Define photosynthesis and state the word equation for the process
- Identify the raw materials, conditions and products of photosynthesis
- Relate photosynthesis to everyday food production such as farming and kitchen gardening

In groups, learners are guided to:
- Watch animations/video clips on the process of photosynthesis and discuss observations
- Identify the raw materials (water and carbon (IV) oxide), conditions (light and chlorophyll) and products (glucose and oxygen) of photosynthesis
- Write the word equation for photosynthesis

What are the raw materials and products of photosynthesis?

- Distinction Biology Learner's Book Grade 10 pg. 114
- Digital resources
- Internet access

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - The light stage of photosynthesis

By the end of the lesson, the learner should be able to:

- Describe the light (light dependent) stage of photosynthesis
- Illustrate the light stage of photosynthesis using a flow chart
- Explain why plants kept in darkness for extended periods eventually die, linking it to the need for light in photolysis

In groups, learners are guided to:
- Discuss the light stage of photosynthesis including photolysis of water molecules
- Illustrate the light stage using flow charts showing the breakdown of water into hydrogen atoms and oxygen gas
- Identify the site of light stage in the chloroplast (grana)

What happens during the light stage of photosynthesis?

- Distinction Biology Learner's Book Grade 10 pg. 115
- Digital resources
- Charts/flow charts

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - The dark stage of photosynthesis

By the end of the lesson, the learner should be able to:

- Describe the dark (light independent) stage of photosynthesis
- Illustrate the dark stage of photosynthesis using a word equation
- Explain how glucose from the dark stage is eventually stored as starch in foods like potatoes and cereals

In groups, learners are guided to:
- Discuss the dark stage of photosynthesis (carbon (IV) oxide fixation)
- Illustrate the dark stage using word equations showing combination of carbon (IV) oxide and hydrogen atoms to form glucose and water
- Identify the site of dark stage in the chloroplast (stroma)

How is carbon (IV) oxide fixed during the dark stage of photosynthesis?

- Distinction Biology Learner's Book Grade 10 pg. 116
- Digital resources
- Charts/flow charts

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Comparing the light and dark stages of photosynthesis
Nutrition - Significance of photosynthesis in nature

By the end of the lesson, the learner should be able to:

- Differentiate between the light and dark stages of photosynthesis
- Illustrate the two stages of photosynthesis using flow charts and equations
- Explain how disrupting either stage, such as deforestation reducing CO₂ absorption, affects the overall process

- Explain the importance of photosynthesis to plants, animals and the environment
- Discuss how photosynthesis ensures food security in the community
- Connect photosynthesis to combating global warming through tree planting and forest conservation

In groups, learners are guided to:
- Analyse the differences between the light dependent and light independent stages of photosynthesis
- Use illustrations (flow charts, equations) to compare the two stages
- Discuss the products of each stage and how they link together
- Discuss the importance of photosynthesis to plants (food production, energy), animals (oxygen, food chains) and the environment (carbon (IV) oxide removal)
- Explain how photosynthesis helps solve global warming by removing carbon (IV) oxide from the atmosphere
- Discuss how photosynthesis ensures food security

How do the light and dark stages of photosynthesis depend on each other?
How does photosynthesis benefit both plants and animals?

- Distinction Biology Learner's Book Grade 10 pg. 115
- Digital resources
- Charts comparing stages
- Distinction Biology Learner's Book Grade 10 pg. 118
- Digital resources
- Charts on importance of photosynthesis

- Written assignments - Oral questions - Observation
- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Significance of photosynthesis in nature

By the end of the lesson, the learner should be able to:

- Explain the importance of photosynthesis to plants, animals and the environment
- Discuss how photosynthesis ensures food security in the community
- Connect photosynthesis to combating global warming through tree planting and forest conservation

In groups, learners are guided to:
- Discuss the importance of photosynthesis to plants (food production, energy), animals (oxygen, food chains) and the environment (carbon (IV) oxide removal)
- Explain how photosynthesis helps solve global warming by removing carbon (IV) oxide from the atmosphere
- Discuss how photosynthesis ensures food security

How does photosynthesis benefit both plants and animals?

- Distinction Biology Learner's Book Grade 10 pg. 118
- Digital resources
- Charts on importance of photosynthesis

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Other products of photosynthesis

By the end of the lesson, the learner should be able to:

- Identify other products of photosynthesis apart from glucose (fatty acids, amino acids)
- Explain the conversion of glucose to starch, fats and proteins in plants
- Relate how plants convert photosynthesis products into nutrients found in everyday foods like beans, avocados and maize

In groups, learners are guided to:
- Discuss how glucose formed during photosynthesis is converted to starch for storage
- Explain the formation of fatty acids (combined to form fats and oils) and amino acids (converted to proteins)
- Search for information on other products of photosynthesis using reference materials

What other substances do plants produce during photosynthesis besides glucose?

- Distinction Biology Learner's Book Grade 10 pg. 117
- Digital resources
- Internet access

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Other products of photosynthesis

By the end of the lesson, the learner should be able to:

- Identify other products of photosynthesis apart from glucose (fatty acids, amino acids)
- Explain the conversion of glucose to starch, fats and proteins in plants
- Relate how plants convert photosynthesis products into nutrients found in everyday foods like beans, avocados and maize

In groups, learners are guided to:
- Discuss how glucose formed during photosynthesis is converted to starch for storage
- Explain the formation of fatty acids (combined to form fats and oils) and amino acids (converted to proteins)
- Search for information on other products of photosynthesis using reference materials

What other substances do plants produce during photosynthesis besides glucose?

- Distinction Biology Learner's Book Grade 10 pg. 117
- Digital resources
- Internet access

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Assessment and review on nutrition in plants

By the end of the lesson, the learner should be able to:

- Answer questions on types of nutrition, chloroplast structure and photosynthesis
- Illustrate the stages of photosynthesis correctly
- Value the role of photosynthesis in sustaining life on earth by discussing real-life examples like oxygen production and food chains

In groups, learners are guided to:
- Answer assessment exercise questions on nutrition in plants
- Draw and label the chloroplast and identify parts where light and dark stages occur
- Discuss the mode of nutrition shown in given pictures (e.g., mould growing on bread)

How do the different types of nutrition and photosynthesis sustain plant life?

- Distinction Biology Learner's Book Grade 10 pg. 119
- Digital resources
- Past assessment questions

- Written tests - Oral questions - Observation

Anatomy and Physiology of Plants

Transport - External structures of the plant transport system

By the end of the lesson, the learner should be able to:

- State the external parts of a plant that form the transport system (roots, stems, leaves)
- Identify the substances transported by each external part
- Relate the transport system in plants to how water reaches the topmost leaves of tall trees in the local environment

In groups, learners are guided to:
- Discuss the structures of external parts of a plant in relation to their transport functions
- Identify substances transported within the plant (water, mineral salts, food substances and waste products)
- Search for information on the external structures of plants that transport substances

What external structures make up the transport system in plants?

- Distinction Biology Learner's Book Grade 10 pg. 120
- Digital resources
- Fresh plant specimens

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Transport - Structure and function of roots in transport

By the end of the lesson, the learner should be able to:

- Describe the regions of the root (cell division, elongation and differentiation)
- Relate the structure of the root to its function in absorption and transport
- Explain why seedlings with damaged root hairs wilt faster than those with intact roots

In groups, learners are guided to:
- Study the longitudinal section of a dicotyledonous root and identify regions of cell division, elongation and differentiation
- Discuss how root hairs increase the surface area for absorption of water and mineral salts
- Draw and label the longitudinal section of a root

How is the root adapted to absorb water and mineral salts?

- Distinction Biology Learner's Book Grade 10 pg. 121
- Digital resources
- Charts of root structure

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Transport - Internal structure of the root (transverse section)

By the end of the lesson, the learner should be able to:

- Describe the internal tissues of the root (piliferous layer, cortex, endodermis, pericycle, vascular tissues)
- Relate the structure of each tissue to its function
- Explain how the casparian strip in the endodermis acts like a filter to protect the plant from absorbing harmful substances

In groups, learners are guided to:
- Study the transverse section of monocotyledonous and dicotyledonous roots
- Identify and describe the piliferous layer, cortex, endodermis (casparian strip), pericycle and vascular tissues
- Discuss the function of each tissue in the root

How do the internal tissues of the root facilitate water and mineral salt absorption?

- Distinction Biology Learner's Book Grade 10 pg. 123
- Digital resources
- Charts/photomicrographs of root cross-sections

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Structure and function of stems in transport
Transport - Structure and function of leaves in transport

By the end of the lesson, the learner should be able to:

- Describe the internal structure of the stem (epidermis, cortex, pith, vascular tissues)
- Relate the structure of the stem to its transport function
- Connect the waxy cuticle on stems to why some plant stems feel smooth and resist water loss

- Describe the role of the leaf in transport (transpiration and translocation)
- Identify the vascular tissues involved in leaf transport
- Explain why leaves of potted plants placed near a sunny window lose water faster through transpiration

In groups, learners are guided to:
- Study cross-sectional drawings of monocotyledonous and dicotyledonous stems
- Identify the epidermis, cortex (parenchyma, collenchyma, sclerenchyma), pith and vascular tissues
- Discuss the functions of the stem as part of the transport system
- Discuss the structure of the leaf in relation to its transport function
- Identify materials transported within the leaf (water, mineral salts, food materials)
- Discuss transpiration and translocation as transport processes in the leaf

How does the structure of the stem support its transport function?
What role does the leaf play in the transport system of plants?

- Distinction Biology Learner's Book Grade 10 pg. 125
- Digital resources
- Fresh plant stems
- Charts of stem cross-sections
- Distinction Biology Learner's Book Grade 10 pg. 127
- Digital resources
- Fresh plant leaves

- Oral questions - Observation - Written assignments
- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Structure, functions and adaptations of xylem vessels

By the end of the lesson, the learner should be able to:

- Describe the structure and adaptations of xylem vessels and tracheids
- Explain how xylem vessels are adapted to transport water and mineral salts
- Relate the lignin deposits in xylem walls to why woody stems are rigid and do not collapse easily

In groups, learners are guided to:
- Study diagrams of xylem vessels and tracheids and discuss their structure
- Discuss the adaptations of xylem to its function (continuous tube, lignified walls, pits, dead cells)
- Search for information on the structure and adaptations of xylem vessels

How are xylem vessels adapted to transport water in plants?

- Distinction Biology Learner's Book Grade 10 pg. 129
- Digital resources
- Charts/diagrams of xylem vessels

- Oral questions - Written assignments - Observation