Anatomy and Physiology of Plants

Nutrition - Types of nutrition in plants (Autotrophism and Heterotrophism)
Nutrition - Parasitism as a mode of nutrition in plants

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

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

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Nutrition - Saprophytic, symbiotic and insectivorous modes of nutrition
Nutrition - Structure of the chloroplast

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

- 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
- Distinction Biology Learner's Book Grade 10 pg. 112
- Charts/diagrams of chloroplast structure

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Function of the chloroplast in plants
Nutrition - The process of photosynthesis

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

- 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

- 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

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

- Distinction Biology Learner's Book Grade 10 pg. 113
- Digital resources
- Internet access
- Distinction Biology Learner's Book Grade 10 pg. 114

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - The light stage of photosynthesis
Nutrition - The dark 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

- 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
- Distinction Biology Learner's Book Grade 10 pg. 116

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Comparing the light and dark stages of photosynthesis

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

- 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

How do the light and dark stages of photosynthesis depend on each other?

- Distinction Biology Learner's Book Grade 10 pg. 115
- Digital resources
- Charts comparing stages

- Written assignments - Oral questions - 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

- 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

- 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
Transport - External structures of the plant transport system

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

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

- Written tests - Oral questions - Observation

Anatomy and Physiology of Plants

Transport - Structure and function of roots in transport
Transport - Internal structure of the root (transverse section)

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

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

- Oral questions - Observation - Written assignments

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

- 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

How does the structure of the stem support its transport function?

- 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
- Fresh plant leaves

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Transport - Structure, functions and adaptations of xylem vessels
Transport - Structure, functions and adaptations of phloem tissue

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

- 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
- Distinction Biology Learner's Book Grade 10 pg. 131
- Charts/diagrams of phloem tissue

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Arrangement of vascular tissues in roots of monocots and dicots (Practical)
Transport - Arrangement of vascular tissues in stems of monocots and dicots (Practical)

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

- Observe and draw cross-sections of monocotyledonous and dicotyledonous roots under a microscope
- Compare the arrangement of vascular tissues in roots of monocots and dicots
- Handle laboratory apparatus such as microscopes and scalpels safely and responsibly

- Cut thin cross-sections of monocotyledonous and dicotyledonous roots, stain with iodine solution and observe under a microscope
- Draw well-labelled cross-sectional drawings of monocot and dicot roots
- Compare the arrangement of vascular tissues in the two types of roots

How does the arrangement of vascular tissues differ in roots of monocots and dicots?

- Distinction Biology Learner's Book Grade 10 pg. 133
- Light microscope
- Fresh plant roots
- Iodine solution, scalpel, glass slides, cover slips
- Distinction Biology Learner's Book Grade 10 pg. 135
- Fresh plant stems

- Observation - Practical assessment - Written assignments

Anatomy and Physiology of Plants

Transport - Mechanisms of water uptake in plants (osmosis and active transport)

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

- Describe the mechanisms of water uptake in plants (osmosis, active transport)
- Explain how water moves from soil particles to the xylem vessels in the root
- Relate osmosis in root hair cells to why plants wilt when placed in very salty soil

- Search for information on mechanisms of water and mineral salt uptake in plants
- Study diagrams showing the absorption of water by plant roots
- Discuss how water moves from the soil particles through the root hair cells to the xylem vessels by osmosis

How does water move from the soil into the root of a plant?

- Distinction Biology Learner's Book Grade 10 pg. 137
- Digital resources
- Charts showing water absorption in plants

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Movement of water up the plant (transpiration pull, cohesion, adhesion, capillarity, root pressure)

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

- Explain the forces that move water up the plant (transpiration pull, cohesion, adhesion, capillarity and root pressure)
- Describe how each force contributes to the upward movement of water
- Relate capillary action in xylem vessels to how water moves up a piece of cloth dipped in water

- Discuss transpiration pull, cohesion forces, adhesion forces, capillarity and root pressure
- Watch animations on the uptake of water and mineral salts in plants
- Explain how exudation and guttation occur in plants

What forces enable water to move from the roots to the leaves against gravity?

- Distinction Biology Learner's Book Grade 10 pg. 139
- Digital resources
- Internet access

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Absorption of mineral salts and demonstrating water uptake (Practical)

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

- Explain the mechanism of mineral salt absorption (active transport and diffusion)
- Carry out an experiment to demonstrate uptake of water in plants using dye/ink
- Handle chemicals like food colouring safely and dispose of waste materials responsibly after the experiment

- Discuss how mineral salts are absorbed by active transport and diffusion
- Carry out a dye/ink experiment to demonstrate uptake of water in plants
- Observe exudation and guttation in the experimental set-up and draw conclusions

How are mineral salts absorbed by plant roots?

- Distinction Biology Learner's Book Grade 10 pg. 141
- Fresh young plants
- Food colouring/ink
- Glass beaker, scalpel, distilled water

- Practical assessment - Observation - Written assignments

Anatomy and Physiology of Plants

Transport - The process of transpiration

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

- Define transpiration and describe how it occurs through the stomata
- Relate the internal structure of the leaf to the process of transpiration
- Explain why clothes dry faster on a sunny windy day, linking it to how transpiration increases under similar conditions

- Discuss the process of transpiration and how water vapour diffuses out through the stomata
- Study the internal structure of the leaf and relate it to transpiration (spongy mesophyll, sub-stomatal air spaces, guard cells)
- Discuss the role of guard cells in controlling the opening and closing of stomata

How does transpiration occur in plant leaves?

- Distinction Biology Learner's Book Grade 10 pg. 143
- Digital resources
- Charts of leaf internal structure

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Structural factors affecting the rate of transpiration

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

- Describe the structural factors that affect the rate of transpiration (leaf size, leaf surface, number and position of stomata, leaf hairs)
- Explain how each structural factor affects transpiration rate
- Explain why cactus plants survive in arid areas by relating their leaf structure to reduced water loss

- Discuss structural factors affecting the rate of transpiration (broad lamina, glossy surface, number of stomata, sunken stomata, leaf hairs)
- Explain midday closure and reversed stomatal rhythm
- Search for information on structural factors using available reference materials

How do leaf structures influence the rate of water loss in plants?

- Distinction Biology Learner's Book Grade 10 pg. 145
- Digital resources
- Internet access

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Environmental factors affecting the rate of transpiration (Temperature and light intensity practicals)

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

- Carry out experiments to demonstrate the effect of temperature and light intensity on transpiration
- Explain how temperature and light intensity affect the rate of transpiration
- Set up a control experiment and explain its purpose in ensuring valid results

- Carry out an experiment using a heat bulb to demonstrate the effect of temperature on transpiration
- Carry out an experiment using a light bulb to demonstrate the effect of light intensity on transpiration
- Compare condensation on plastic bottles/carrier bags in both experiments and draw conclusions

How do temperature and light intensity affect the rate of transpiration?

- Distinction Biology Learner's Book Grade 10 pg. 147
- Potted plants
- Heat bulb, light bulb
- Transparent carrier bags, elastic bands

- Practical assessment - Observation - Written assignments

Anatomy and Physiology of Plants

Transport - Environmental factors affecting the rate of transpiration (Wind practical and other factors)

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

- Carry out an experiment to demonstrate the effect of wind on transpiration
- Describe how humidity, atmospheric pressure and water availability affect transpiration
- Improvise a fan from locally available materials, demonstrating creativity and resourcefulness

- Carry out an experiment using an improvised fan to demonstrate the effect of wind on transpiration
- Discuss how humidity, atmospheric pressure and water availability in the soil affect the rate of transpiration
- Compare water droplets on carrier bags of potted plants near and far from the fan

How do wind, humidity and water availability affect the rate of transpiration?

- Distinction Biology Learner's Book Grade 10 pg. 149
- Potted plants
- Improvised fan materials
- Transparent carrier bags, elastic bands

- Practical assessment - Observation - Written assignments

Anatomy and Physiology of Plants

Transport - Translocation of manufactured food in plants

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

- Define translocation and describe the process in plants
- Identify the materials transported during translocation (sucrose, amino acids, vitamins)
- Relate translocation to why fruits, roots and seeds store food, as seen in everyday crops like sugarcane and sweet potatoes

- Discuss the process of translocation of manufactured food from the leaves to other parts of the plant
- Watch animations on translocation and share with peers
- Identify the vascular tissues (phloem) involved in translocation

How is manufactured food transported from the leaves to other parts of the plant?

- Distinction Biology Learner's Book Grade 10 pg. 151
- Digital resources
- Internet access

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Demonstrating translocation by bark ringing and significance of transport in plants

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

- Carry out a bark ringing (girdling) experiment to demonstrate translocation
- Explain the importance of transport in plants
- Carry out bark ringing responsibly without destroying the entire plant, showing care for the environment

- Carry out a bark ringing/girdling experiment on a young tree to demonstrate translocation
- Observe the swelling above the ring and wilting below and draw conclusions
- Discuss the importance of transport in plants (distribution of nutrients, removal of waste products)

What evidence confirms translocation of food in plants?

- Distinction Biology Learner's Book Grade 10 pg. 153
- Young tree/woody plant
- Knife, permanent marker pen
- Digital device for recording

- Practical assessment - Observation - Written assignments

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Meaning and significance of gaseous exchange in plants
Gaseous Exchange and Respiration - Stomata as a site for gaseous exchange (Practical)

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

- Define gaseous exchange in plants
- Explain the significance of gaseous exchange to plants and the environment
- Relate gaseous exchange to why indoor plants help improve air quality in homes and classrooms

- Search for information on the meaning of gaseous exchange and discuss with peers
- Identify the respiratory gases (oxygen and carbon (IV) oxide) and their movement during the day and at night
- Discuss the significance of gaseous exchange to plants (photosynthesis, respiration, transpiration) and the environment (balance of atmospheric gases, air purification)

Why is gaseous exchange important to plants and the environment?

- Distinction Biology Learner's Book Grade 10 pg. 151
- Digital resources
- Internet access
- Distinction Biology Learner's Book Grade 10 pg. 155
- Fresh plant leaves
- Clear nail polish
- Light microscope, glass slides, cover slips

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Distribution of stomata in different plant habitats
Gaseous Exchange and Respiration - Lenticels as gaseous exchange sites in stems

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

- Describe the distribution of stomata in xerophytes, hydrophytes and mesophytes
- Investigate the number, size and distribution of stomata in leaves from different habitats
- Explain why water lilies have stomata on the upper surface while desert plants have few sunken stomata on the lower surface

- Collect fresh leaves from plants in different habitats and observe stomatal distribution under a microscope
- Count the number of stomata and observe their sizes and distribution on both sides of the leaf
- Discuss adaptations of stomata in xerophytes (few, sunken, thick cuticle), hydrophytes (numerous, upper epidermis) and mesophytes (evenly distributed)

How does the habitat of a plant influence the distribution of stomata on its leaves?

- Distinction Biology Learner's Book Grade 10 pg. 157
- Fresh leaf samples from different habitats
- Light microscope, nail polish
- Glass slides, cover slips
- Distinction Biology Learner's Book Grade 10 pg. 161
- Photomicrographs of lenticels
- Digital resources

- Practical assessment - Observation - Written assignments

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Pneumatophores as gaseous exchange sites in roots
Gaseous Exchange and Respiration - Photosynthetic theory of stomatal opening and closing

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

- Describe the structure and adaptations of pneumatophores for gaseous exchange
- Explain the mechanism of gaseous exchange through pneumatophores
- Relate pneumatophores to the visible breathing roots of mangrove trees growing in swampy areas along the Kenyan coast

- Study photographs/diagrams of pneumatophores and discuss their structure (lenticels, aerenchyma tissues)
- Discuss how pneumatophores grow above the water level to obtain oxygen from the atmosphere
- Explain the role of aerenchyma tissues in storing air for gaseous exchange

How do plants in waterlogged areas carry out gaseous exchange?

- Distinction Biology Learner's Book Grade 10 pg. 163
- Photomicrographs/pictures of pneumatophores
- Digital resources
- Distinction Biology Learner's Book Grade 10 pg. 165
- Digital resources
- Charts showing open and closed stomata

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Starch-sugar inter-conversion theory
Gaseous Exchange and Respiration - Potassium ion theory of stomatal opening and closing

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

- Describe the mechanism of opening and closing of stomata using the starch-sugar inter-conversion theory
- Explain the role of pH in the conversion of starch to glucose and vice versa
- Connect how changes in carbon (IV) oxide levels during day and night trigger a chain reaction that opens or closes stomata

- Discuss how during the day, carbon (IV) oxide is used for photosynthesis causing pH to rise favouring conversion of starch to glucose
- Explain how glucose increases osmotic pressure of guard cells causing water uptake and stomata to open
- Discuss the reverse process at night when carbon (IV) oxide accumulates lowering pH

How does the conversion between starch and sugar control stomatal opening?

- Distinction Biology Learner's Book Grade 10 pg. 167
- Digital resources
- Internet access
- Distinction Biology Learner's Book Grade 10 pg. 168
- Internet access
- Charts comparing the three theories

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - The process of respiration and aerobic respiration

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

- Define respiration and state the word equation for aerobic respiration
- Describe the stages of aerobic respiration (glycolysis and Kreb's cycle)
- Connect aerobic respiration to why living cells need a constant supply of oxygen to release energy for growth and repair

- Search for information on the process of respiration and discuss with peers
- Identify the cell organelle where respiration occurs (mitochondria)
- Discuss aerobic respiration including glycolysis (cytoplasm) and Kreb's cycle (matrix of mitochondria)

How do plants break down glucose to release energy?

- Distinction Biology Learner's Book Grade 10 pg. 169
- Digital resources
- Internet access

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Anaerobic respiration in plants

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

- Define anaerobic respiration and state its word equation
- Distinguish between aerobic and anaerobic respiration
- Relate anaerobic respiration to the production of alcohol in local brewing and the rising of bread dough during baking

- Discuss anaerobic respiration as the breakdown of glucose in the absence of oxygen producing ethanol, carbon (IV) oxide and less energy
- Compare aerobic and anaerobic respiration in terms of oxygen requirement, energy released and products
- Discuss where anaerobic respiration occurs in plants (waterlogged areas, germinating seeds)

How does anaerobic respiration differ from aerobic respiration?

- Distinction Biology Learner's Book Grade 10 pg. 171
- Digital resources
- Internet access

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Investigating aerobic and anaerobic respiration (Practical)

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

- Carry out experiments to distinguish between aerobic and anaerobic respiration
- Explain the role of calcium hydroxide solution and paraffin in the experiments
- Observe safety precautions when handling chemicals and dispose of waste materials appropriately after the experiment

- Set up experiments using germinating bean seeds to demonstrate aerobic respiration (test tube A) and boiled bean seeds to demonstrate anaerobic respiration (test tube B)
- Observe the colour change of calcium hydroxide solution and record temperature readings
- Discuss the role of paraffin in blocking oxygen entry

How can aerobic and anaerobic respiration be demonstrated experimentally?

- Distinction Biology Learner's Book Grade 10 pg. 172
- Germinating and boiled bean seeds
- Test tubes, delivery tubes, rubber stoppers
- Calcium hydroxide solution, paraffin, glucose solution

- Practical assessment - Observation - Written assignments

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Economic importance of anaerobic respiration

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

- Explain the economic importance of anaerobic respiration in various industries
- Describe how anaerobic respiration is applied in brewing, baking, dairy and biogas production
- Relate anaerobic respiration to locally made products like yoghurt, cheese, bread and traditional fermented drinks

- Discuss the economic importance of anaerobic respiration in brewing, baking, biogas production, dairy industry, sewage treatment, silage formation, pharmaceutical industry and compost manure production
- Explain how yeast breaks down sugars anaerobically in brewing and baking
- Discuss how bacteria produce lactic acid in dairy products

How is anaerobic respiration applied in everyday industries and products?

- Distinction Biology Learner's Book Grade 10 pg. 174
- Digital resources
- Charts showing applications of anaerobic respiration

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Biogas production project

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

- Demonstrate anaerobic respiration through a biogas production project
- Describe the procedure and observations in biogas production
- Relate biogas production to waste management and renewable energy solutions in rural Kenyan communities

- Set up a simple biogas digester using organic waste and water in a sealed container
- Observe balloon inflation over 5-7 days as biogas is produced
- Test the collected gas by bringing it near a flame and observing the blue flame

How can anaerobic respiration be harnessed for biogas production?

- Distinction Biology Learner's Book Grade 10 pg. 175
- Large plastic bottle/container
- Organic waste, water
- Rubber tubing, balloon, tape

- Project assessment - Observation - Written report

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Significance of gaseous exchange and respiration to plants and the environment

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

- Outline the significance of gaseous exchange and respiration to plants and the environment
- Design a portfolio illustrating the significance of gaseous exchange and respiration
- Relate the significance of gaseous exchange to why deforestation contributes to climate change and why reforestation is encouraged

- Discuss the significance of gaseous exchange and respiration to plants (energy production, growth, photosynthesis) and the environment (oxygen supply, carbon cycling, temperature regulation)
- Design a portfolio illustrating the significance of gaseous exchange and respiration
- Show portfolios to peers for assessment

How do gaseous exchange and respiration contribute to the survival of plants and the environment?

- Distinction Biology Learner's Book Grade 10 pg. 177
- Digital resources
- Portfolio materials

- Portfolio assessment - Oral questions - Observation

Anatomy and Physiology of Plants
Anatomy and Physiology of Animals

Gaseous Exchange and Respiration - Assessment and review on gaseous exchange and respiration
Mouthparts of insects - Structure of mouthparts of insects and their functions

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

- Answer assessment questions on gaseous exchange sites, stomatal mechanisms, types of respiration and economic importance of anaerobic respiration
- Distinguish between gaseous exchange and respiration in plants
- Connect the concepts learned to real-life applications such as food preservation, energy production and environmental conservation

- Answer assessment exercise questions on gaseous exchange and respiration
- Distinguish between gaseous exchange and respiration
- Identify and explain adaptations of gaseous exchange structures (stomata, lenticels, pneumatophores, aerenchyma)
- Describe mechanisms of opening and closing of stomata using the three theories

How are gaseous exchange and respiration essential to the survival of plants?

- Distinction Biology Learner's Book Grade 10 pg. 178
- Digital resources
- Past assessment questions
- Distinction Biology Learner's Book pg. 175
- Fresh locust, grasshopper or cockroach
- Hand lens or dissecting microscope
- Pair of forceps
- Petri dish
- Protective clothing

- Written tests - Oral questions - Observation

Anatomy and Physiology of Animals

Mouthparts of insects - Biting and chewing mouthparts
Mouthparts of insects - Piercing and sucking mouthparts

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

- Describe the biting and chewing mode of feeding in insects
- Relate the structure of mouthparts of a locust, grasshopper or cockroach to their mode of feeding
- Value the role of insect feeding adaptations in maintaining ecological balance, such as pollination and decomposition

- Search the Internet or use reference books to find information on biting and chewing mouthparts
- Discuss how the mandibles of a locust are adapted for cutting and chewing food
- Use digital devices to watch video animations on mouthparts of biting and chewing insects
- Relate the structures of the mouthparts to the mode of feeding

How are the mouthparts of a grasshopper adapted for biting and chewing food?

- Distinction Biology Learner's Book pg. 175
- Digital resources
- Internet access
- Charts showing mouthparts of insects
- Distinction Biology Learner's Book pg. 177
- Photographs of mosquito and tsetse fly mouthparts

- Oral questions - Written assignments - Peer assessment of drawings

Anatomy and Physiology of Animals

Mouthparts of insects - Siphoning mouthparts
Mouthparts of insects - Comparing mouthparts and modes of feeding

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

- Describe the siphoning mode of feeding in butterflies and moths
- Relate the structure of the proboscis to its function in siphoning nectar
- Relate siphoning in butterflies to real-life processes such as pollination of flowers in farms and gardens

- Study photographs and illustrations of siphoning mouthparts of a butterfly or moth
- Discuss how the proboscis is adapted for siphoning nectar
- Relate the structure of the proboscis to its function in siphoning
- Use digital devices to watch video animations on siphoning mouthparts

How is the proboscis of a butterfly adapted for siphoning nectar from flowers?

- Distinction Biology Learner's Book pg. 178
- Digital resources
- Internet access
- Photographs of butterfly mouthparts
- Distinction Biology Learner's Book pg. 179
- Charts showing mouthparts of various insects
- Internet access

- Oral questions - Written assignments - Class presentations

Anatomy and Physiology of Animals

Beaks of birds - Structure of beaks of birds
Beaks of birds - Filter feeders, fish eaters and wood chippers

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

- Identify different types of beaks in birds
- Describe the structure of beaks in seed eaters, flesh eaters and nectar feeders
- Relate bird beak diversity to everyday observations such as sparrows feeding on grains and eagles hunting prey

- Observe images, animations and charts of beaks of birds with different modes of feeding
- Use digital devices to search for information on the structure of beaks of seed eaters, flesh eaters and nectar feeders
- Discuss how the beaks of sparrows, eagles and sunbirds are adapted to their mode of feeding
- Draw and label beaks of different birds

How does the shape of a bird's beak determine what it feeds on?

- Distinction Biology Learner's Book pg. 181
- Digital resources
- Internet access
- Charts and photographs of bird beaks
- Distinction Biology Learner's Book pg. 183
- Photographs of bird beaks

- Oral questions - Labelled drawings - Observation

Anatomy and Physiology of Animals

Beaks of birds - Fruit eaters, multipurpose feeders and insect eaters
Beaks of birds - Nature walk to observe birds and their feeding habits

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

- Describe the structure of beaks in fruit eaters, multipurpose feeders and insect eaters
- Relate the structure of beaks of parrots and crows to their mode of feeding
- Connect multipurpose feeding in crows to real-life observations of birds scavenging in market areas and homesteads

- Study photographs and illustrations of beaks of parrots and crows
- Discuss how the strong curved beak of a parrot is adapted for feeding on fruits
- Explain multipurpose feeding in crows and how their thick sturdy beak is adapted for varied feeding
- Tabulate the relationship between beaks of birds and their modes of feeding

How does the beak of a crow enable it to feed on different types of food?

- Distinction Biology Learner's Book pg. 183
- Digital resources
- Internet access
- Photographs and charts of bird beaks
- Distinction Biology Learner's Book pg. 184
- Binoculars (optional)
- Magnifying glass
- Digital devices
- Protective clothing such as reflective vests and proper shoes

- Written assignments - Oral questions - Peer assessment

Anatomy and Physiology of Animals

Beaks of birds - Comparing beaks and modes of feeding in birds

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

- Compare the structure and function of beaks in different birds
- Tabulate the adaptations of beaks of birds to their modes of feeding
- Apply knowledge of beak adaptations to real-life situations such as understanding why certain birds are effective pest controllers in farms

- Draw a comparison table relating the structure of beaks of birds to their modes of feeding
- Discuss and compare the beaks of seed eaters, flesh eaters, nectar feeders, filter feeders, fish eaters, wood chippers, fruit eaters and multipurpose feeders
- Share findings with peers for discussion and peer assessment

Why do birds have differently shaped and sized beaks?

- Distinction Biology Learner's Book pg. 185
- Charts and photographs of bird beaks
- Digital resources
- Internet access

- Written assignments - Oral questions - Peer assessment

Anatomy and Physiology of Animals

Importance of diversity in feeding modes of insects and birds

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

- Explain the importance of diversity in feeding modes of insects and birds in nature
- Describe how diversity in feeding modes helps in pollination, seed dispersal and pest control
- Relate feeding diversity to real-life environmental benefits such as how insect-eating birds reduce crop pests in farms and how nectar-feeding insects support fruit production

- Discuss the importance of diversity in feeding modes of insects and birds in nature
- Explain how diversity in feeding modes of insects and birds helps in plant pollination and seed dispersal
- Describe how birds feeding on insects help in controlling pests in the environment
- Analyse a wheel chart on the importance of diversity in feeding modes

How does the diversity in feeding modes of insects and birds benefit the environment?

- Distinction Biology Learner's Book pg. 185
- Digital resources
- Internet access
- Charts on importance of feeding diversity

- Oral questions - Written assignments - Class discussions