Anatomy and Physiology of Plants

Nutrition - Types of nutrition in plants (Autotrophism and Heterotrophism)
Nutrition - Parasitism as a mode of nutrition in 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 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
- 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:
- 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
- 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 plants obtain nutrients from their environment?
How do parasitic plants obtain nutrients from their host?

- 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
- Digital resources
- Pictures of parasitic plants
- Distinction Biology Learner's Book Grade 10 pg. 110
- Pictures/charts of insectivorous plants
- Distinction Biology Learner's Book Grade 10 pg. 112
- Charts/diagrams of chloroplast structure

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

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

In groups, learners are guided to:
- 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
- Distinction Biology Learner's Book Grade 10 pg. 115
- Charts/flow charts

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - The dark stage of photosynthesis
Nutrition - Comparing the light and dark stages 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
- Distinction Biology Learner's Book Grade 10 pg. 115
- Charts comparing stages

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Significance of photosynthesis in nature
Nutrition - Other products of photosynthesis

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
- Distinction Biology Learner's Book Grade 10 pg. 117
- 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
Transport - Structure and function of roots in transport
Transport - Internal structure of the root (transverse section)
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:
- 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
- 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:
- 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)
- 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 different types of nutrition and photosynthesis sustain plant life?
How do the internal tissues of the root facilitate water and mineral salt absorption?

- 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
- Distinction Biology Learner's Book Grade 10 pg. 121
- Charts of root structure
- Distinction Biology Learner's Book Grade 10 pg. 123
- Digital resources
- Charts/photomicrographs of root cross-sections
- Distinction Biology Learner's Book Grade 10 pg. 125
- Fresh plant stems
- Charts of stem cross-sections
- Distinction Biology Learner's Book Grade 10 pg. 127
- Fresh plant leaves

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

Anatomy and Physiology of Plants

Transport - Structure, functions and adaptations of xylem vessels
Transport - Structure, functions and adaptations of phloem tissue
Transport - Arrangement of vascular tissues in roots of monocots and dicots (Practical)

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
- Distinction Biology Learner's Book Grade 10 pg. 131
- Charts/diagrams of phloem tissue
- Distinction Biology Learner's Book Grade 10 pg. 133
- Light microscope
- Fresh plant roots
- Iodine solution, scalpel, glass slides, cover slips

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Arrangement of vascular tissues in stems of monocots and dicots (Practical)
Transport - Mechanisms of water uptake in plants (osmosis and active transport)

By the end of the lesson, the learner should be able to:
- Observe and draw cross-sections of monocotyledonous and dicotyledonous stems under a microscope
- Compare the arrangement of vascular tissues in stems of monocots and dicots
- Collect plant specimens responsibly without destroying other plants in the environment

In groups, learners are guided to:
- Cut thin cross-sections of monocotyledonous and dicotyledonous stems, stain and observe under a microscope
- Draw well-labelled cross-sectional drawings of monocot and dicot stems
- Outline the similarities and differences of vascular tissues in stems of monocots and dicots

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

- Distinction Biology Learner's Book Grade 10 pg. 135
- Light microscope
- Fresh plant stems
- Iodine solution, scalpel, glass slides, cover slips
- Distinction Biology Learner's Book Grade 10 pg. 137
- Digital resources
- Charts showing water absorption in plants

- Observation - Practical assessment - Written assignments

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

In groups, learners are guided to:
- 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)
Transport - The process of transpiration
Transport - Structural factors affecting the rate of transpiration

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
- 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

In groups, learners are guided to:
- 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
- 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 are mineral salts absorbed by plant roots?
How do leaf structures influence the rate of water loss in plants?

- Distinction Biology Learner's Book Grade 10 pg. 141
- Fresh young plants
- Food colouring/ink
- Glass beaker, scalpel, distilled water
- Distinction Biology Learner's Book Grade 10 pg. 143
- Digital resources
- Charts of leaf internal structure
- Distinction Biology Learner's Book Grade 10 pg. 145
- Digital resources
- Internet access

- Practical assessment - Observation - Written assignments
- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

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

In groups, learners are guided to:
- 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
- Distinction Biology Learner's Book Grade 10 pg. 149
- Improvised fan materials

- Practical assessment - Observation - Written assignments

Anatomy and Physiology of Plants

Transport - Translocation of manufactured food in 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:
- 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

In groups, learners are guided to:
- 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
- Distinction Biology Learner's Book Grade 10 pg. 153
- Young tree/woody plant
- Knife, permanent marker pen
- Digital device for recording

- Oral questions - Written assignments - Observation

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)
Gaseous Exchange and Respiration - Distribution of stomata in different plant habitats

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

In groups, learners are guided to:
- 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
- Distinction Biology Learner's Book Grade 10 pg. 157
- Fresh leaf samples from different habitats
- Light microscope, nail polish
- Glass slides, cover slips

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Gaseous Exchange and Respiration - Lenticels as gaseous exchange sites in stems
Gaseous Exchange and Respiration - Pneumatophores as gaseous exchange sites in roots
Gaseous Exchange and Respiration - Photosynthetic theory of stomatal opening and closing
Gaseous Exchange and Respiration - Starch-sugar inter-conversion theory
Gaseous Exchange and Respiration - Potassium ion theory of stomatal opening and closing
Gaseous Exchange and Respiration - The process of respiration and aerobic respiration

By the end of the lesson, the learner should be able to:
- Describe the structure and adaptations of lenticels for gaseous exchange
- Explain the mechanism of gaseous exchange through lenticels
- Relate lenticels to the small raised spots visible on the bark of woody plants like hibiscus or guava trees
- 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

In groups, learners are guided to:
- Study photomicrographs of lenticels and discuss their structure (loosely packed cork cells, thin film of moisture)
- Discuss how lenticels carry out gaseous exchange continuously
- Explain the mechanism of gaseous exchange through lenticels (diffusion of oxygen in and carbon (IV) oxide out)
- 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 do lenticels facilitate gaseous exchange in woody stems?
How does the conversion between starch and sugar control stomatal opening?

- Distinction Biology Learner's Book Grade 10 pg. 161
- Photomicrographs of lenticels
- Digital resources
- Distinction Biology Learner's Book Grade 10 pg. 163
- Photomicrographs/pictures of pneumatophores
- Distinction Biology Learner's Book Grade 10 pg. 165
- Digital resources
- Charts showing open and closed stomata
- 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
- Distinction Biology Learner's Book Grade 10 pg. 169

- 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

In groups, learners are guided to:
- 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)
Gaseous Exchange and Respiration - Economic importance of anaerobic respiration

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

In groups, learners are guided to:
- 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
- Distinction Biology Learner's Book Grade 10 pg. 174
- Digital resources
- Charts showing applications of anaerobic respiration

- Practical assessment - Observation - Written assignments

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

In groups, learners are guided to:
- 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
Anatomy and Physiology of Animals

Gaseous Exchange and Respiration - Significance of gaseous exchange and respiration to plants and the environment
Gaseous Exchange and Respiration - Assessment and review on gaseous exchange and respiration
Mouthparts of insects - Structure of mouthparts of insects and their functions
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:
- 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
- Define the term nutrition in animals
- Identify the mouthparts of a locust, grasshopper or cockroach using a hand lens
- Handle specimens responsibly during collection and observation in the school environment

In groups, learners are guided to:
- 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
- Collect fresh specimens of locust/grasshopper/cockroach from the school environment
- Observe the mouthparts using a hand lens or dissecting microscope
- Identify the structures of the mouthparts such as the upper and lower lips, tongue-like structures and jaws
- Draw well-labelled diagrams of the mouthparts observed

How do gaseous exchange and respiration contribute to the survival of plants and the environment?
What structures make up the mouthparts of a locust or grasshopper?

- Distinction Biology Learner's Book Grade 10 pg. 177
- Digital resources
- Portfolio materials
- Distinction Biology Learner's Book Grade 10 pg. 178
- 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
- Digital resources
- Internet access
- Charts showing mouthparts of insects
- Distinction Biology Learner's Book pg. 177
- Photographs of mosquito and tsetse fly mouthparts

- Portfolio assessment - Oral questions - Observation
- Observation - Oral questions - Labelled drawings

Anatomy and Physiology of Animals

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

In groups, learners are guided to:
- 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
- Distinction Biology Learner's Book pg. 181
- Charts and photographs of bird beaks
- Distinction Biology Learner's Book pg. 183
- Photographs of bird beaks

- Oral questions - Written assignments - Class presentations

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

In groups, learners are guided to:
- 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
Importance of diversity in feeding modes of insects and 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

In groups, learners are guided to:
- 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
- Internet access
- Charts on importance of feeding diversity

- Written assignments - Oral questions - Peer assessment

Anatomy and Physiology of Animals

Significance of transport in animals
Types of circulatory systems - Open and closed circulatory systems
Types of circulatory systems - Single and double circulatory systems
Transport system in insects
Transport system in fish - Structure and blood flow
Transport system in fish - Illustrating the circulatory system

By the end of the lesson, the learner should be able to:
- Define the term transport system in animals
- Explain the importance of transport in animals
- Relate transport systems in animals to real-life examples such as how blood carries oxygen to muscles during exercise
- Identify the components of the transport system in insects
- Describe the movement of haemolymph within the body cavity of an insect
- Relate the open circulatory system in insects to real-life observations of how small-bodied insects like houseflies and cockroaches function efficiently

In groups, learners are guided to:
- Search for information on the meaning and importance of transport systems in animals using print and non-print media
- Discuss the meaning of a transport system in animals
- Explain the importance of transport systems in distributing oxygen, nutrients, hormones and removing waste products
- Share findings with peers
- Search for information on the transport system in insects
- Study the structure of the transport system in insects including the dorsal vessel, ostia, haemolymph and haemocoel
- Describe the circulation of haemolymph in the body cavity
- Draw a well-labelled diagram of the transport system in insects

Why is a transport system important for the survival of animals?
What are the components of the circulatory system in insects and how does haemolymph flow?

- Distinction Biology Learner's Book pg. 186
- Digital resources
- Internet access
- Reference books
- Distinction Biology Learner's Book pg. 188
- Charts showing circulatory systems
- Distinction Biology Learner's Book pg. 189
- Charts showing single and double circulation
- Distinction Biology Learner's Book pg. 190
- Digital resources
- Internet access
- Charts showing insect circulatory system
- Distinction Biology Learner's Book pg. 192
- Charts showing fish circulatory system
- Distinction Biology Learner's Book pg. 193
- Reference books

- Oral questions - Written assignments - Observation
- Labelled drawings - Oral questions - Peer assessment

Anatomy and Physiology of Animals

Transport system in amphibians - Structure and blood flow
Transport system in amphibians - Illustrating the circulatory system
Transport system in reptiles - Structure and blood flow

By the end of the lesson, the learner should be able to:
- Identify the structures that compose the transport system in amphibians
- Describe pulmonary and systemic circulation in amphibians
- Connect the three-chambered heart in amphibians to real-life understanding of how frogs survive both in water and on land

In groups, learners are guided to:
- Search for information on the transport system in amphibians using print and non-print resources
- Study illustrations of the transport system in amphibians
- Identify the three-chambered heart (one ventricle and two atria), blood vessels, lungs and blood
- Describe pulmonary and systemic circulation in amphibians

How does the double circulatory system in amphibians support their life on land and in water?

- Distinction Biology Learner's Book pg. 194
- Digital resources
- Internet access
- Charts showing amphibian circulatory system
- Distinction Biology Learner's Book pg. 195
- Reference books
- Distinction Biology Learner's Book pg. 197
- Charts showing reptile circulatory system

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Animals

Transport system in reptiles - Illustrating the circulatory system

By the end of the lesson, the learner should be able to:
- Illustrate the structure of the transport system in reptiles
- Explain the significance of the partial septum in the reptile heart
- Relate the ectothermic nature of reptiles to real-life observations of lizards sunbathing on rocks and walls

In groups, learners are guided to:
- Draw a well-labelled diagram of the circulatory system in reptiles
- Discuss the role of the partial septum in reducing mixing of oxygenated and deoxygenated blood
- Compare the circulatory systems of amphibians and reptiles
- Share drawings with peers for peer assessment

Why is the transport system in reptiles suited to their ectothermic nature?

- Distinction Biology Learner's Book pg. 198
- Digital resources
- Internet access
- Reference books

- Peer assessment of drawings - Oral questions - Written assignments

Anatomy and Physiology of Animals

Transport system in mammals - Structure and components
Transport system in mammals - Pulmonary and systemic circulation

By the end of the lesson, the learner should be able to:
- Identify the structures that compose the transport system in mammals
- Describe the components of the mammalian circulatory system
- Relate the four-chambered mammalian heart to real-life understanding of why mammals like humans can perform sustained physical activities

In groups, learners are guided to:
- Search for information on the transport system in mammals using print and non-print resources
- Study illustrations and photographs of the circulatory system in mammals
- Identify the four-chambered heart, blood vessels, blood and circulatory pathways
- Discuss the components of the mammalian circulatory system

What are the key components of the mammalian transport system?

- Distinction Biology Learner's Book pg. 199
- Digital resources
- Internet access
- Charts showing mammalian circulatory system
- Distinction Biology Learner's Book pg. 200
- Reference books

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Animals

Transport system in mammals - Illustrating the circulatory system
Transport system in mammals - Dissection of a small mammal
Pumping mechanism of the mammalian heart - Structure of the heart

By the end of the lesson, the learner should be able to:
- Illustrate the structure of the transport system in mammals
- Draw a well-labelled diagram of the mammalian circulatory system
- Relate the efficient separation of oxygenated and deoxygenated blood to real-life benefits like high energy levels in active mammals such as cheetahs and horses
- Dissect a small mammal to observe parts of the transport system
- Identify the heart, lungs, blood vessels and other organs of the transport system
- Handle specimens humanely and relate the observed structures to how the circulatory system supports life in real mammals

In groups, learners are guided to:
- Draw a well-labelled diagram of the circulatory system in mammals
- Use digital devices to search for pictures showing the transport system in mammals
- Exchange exercise books with peers for peer assessment
- Compare the circulatory systems of insects, fish, amphibians, reptiles and mammals
- Wear protective clothing (hand gloves and laboratory coat)
- With the help of the teacher, carry out the dissection of a freshly killed rat or rabbit
- Observe the thoracic cavity containing the heart and lungs
- Identify the pulmonary vein, pulmonary artery, blood vessels and renal veins
- Draw a well-labelled diagram of the transport system of the mammal

Why do mammals have a more efficient circulatory system compared to other animals?
What structures can be observed in the transport system of a dissected mammal?

- Distinction Biology Learner's Book pg. 200
- Digital resources
- Internet access
- Reference books
- Distinction Biology Learner's Book pg. 201
- Freshly killed rat or rabbit
- Dissecting board and pins
- Cotton wool
- Hand lens
- Protective clothing
- Distinction Biology Learner's Book pg. 202
- Digital resources
- Internet access
- Charts showing the mammalian heart

- Peer assessment of drawings - Written assignments - Oral questions
- Labelled drawings - Observation - Oral questions

Anatomy and Physiology of Animals

Pumping mechanism of the mammalian heart - The cardiac cycle
Human lymphatic system - Structure and components

By the end of the lesson, the learner should be able to:
- Describe the pumping mechanism of the mammalian heart
- Explain systole and diastole in the cardiac cycle
- Connect the cardiac cycle to real-life experiences such as feeling the pulse at the wrist or neck during exercise

In groups, learners are guided to:
- Watch animations illustrating the pumping mechanism of the mammalian heart
- Describe the flow of blood from the vena cava through the heart chambers and out through the aorta
- Explain the role of valves in preventing backflow of blood
- Discuss the contraction (systole) and relaxation (diastole) phases of the cardiac cycle

How does the heart pump blood through the body in a continuous cycle?

- Distinction Biology Learner's Book pg. 203
- Digital resources
- Internet access
- Reference books
- Distinction Biology Learner's Book pg. 204
- Charts showing the lymphatic system

- Oral questions - Written assignments - Class discussions

Anatomy and Physiology of Animals

Human lymphatic system - Functions

By the end of the lesson, the learner should be able to:
- Explain the functions of the human lymphatic system
- Describe how the lymphatic system helps maintain fluid balance and defend against infections
- Relate lymphatic functions to real-life examples such as how swollen ankles (oedema) occur when the lymphatic system fails to drain excess fluid

In groups, learners are guided to:
- Discuss the functions of the human lymphatic system including maintaining fluid balance, filtering pathogens and absorbing fats
- Explain how lymph nodes house immune cells that detect and fight infections
- Describe how the lymphatic system returns excess tissue fluid to the bloodstream
- Share work with classmates for comparison

How does the lymphatic system protect the body against infections?

- Distinction Biology Learner's Book pg. 205
- Digital resources
- Internet access
- Reference books

- Written assignments - Oral questions - Class discussions

Anatomy and Physiology of Animals

Human immune system - Types of immunity
Human immune system - Active and passive immunity

By the end of the lesson, the learner should be able to:
- Describe the immune system in human beings
- Distinguish between inherited and acquired immunity
- Relate immunity to real-life experiences such as why a person who recovers from chickenpox rarely gets it again

In groups, learners are guided to:
- Study a flow chart illustrating forms of immunity
- Distinguish between inherited (innate) and acquired immunity
- Discuss how inherited immunity is passed from parent to offspring
- Explain how acquired immunity develops through interaction with the environment
- Distinguish between active and passive immunity

What is the difference between inherited and acquired immunity?

- Distinction Biology Learner's Book pg. 206
- Digital resources
- Internet access
- Charts showing types of immunity
- Distinction Biology Learner's Book pg. 207
- Reference books

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Animals

Blood clotting mechanism in humans

By the end of the lesson, the learner should be able to:
- Describe the mechanism of blood clotting in human beings
- Identify the role of platelets, thromboplastin, thrombin and fibrin in blood clotting
- Connect blood clotting to real-life experiences such as how a cut on the skin stops bleeding and forms a scab

In groups, learners are guided to:
- Watch video animations on the mechanism of blood clotting using digital devices
- Identify the blood cells (platelets) involved in blood clotting
- Describe the steps in the blood clotting process: platelets release thromboplastin, prothrombin converts to thrombin, fibrinogen converts to fibrin
- Discuss the role of calcium ions and vitamin K in blood clotting

What happens in the body when a blood vessel is injured to stop bleeding?

- Distinction Biology Learner's Book pg. 207
- Digital resources
- Internet access
- Charts showing the blood clotting process

- Oral questions - Written assignments - Observation