Cell Biology and Biodiversity

Structure of plant cells as seen under electron microscope
Structure of animal cells as seen under electron microscope

By the end of the lesson, the learner should be able to:
- Describe the structure of plant cells as seen under electron microscope
- Draw and label plant cell organelles
- Relate plant cell structure to functions like photosynthesis which produces food and oxygen for human survival

In groups, learners are guided to:
- Study photomicrographs or charts of plant cells under electron microscope
- Identify and label organelles: cell wall, cell membrane, nucleus, chloroplast, mitochondria, vacuole, endoplasmic reticulum, golgi apparatus, ribosomes
- Draw and label plant cell structure

What structures are visible in a plant cell under an electron microscope?

- Spotlight Biology Learner's Book pg. 38
- Photomicrographs of plant cells
- Charts, models
- Spotlight Biology Learner's Book pg. 40
- Photomicrographs of animal cells

- Oral questions - Drawing assessment - Written assignments

Cell Biology and Biodiversity

Functions of cell organelles
Comparing plant and animal cells

By the end of the lesson, the learner should be able to:
- Describe the functions of cell organelles
- Relate structure of organelles to their functions
- Connect organelle functions to real-life processes like energy production for physical activities and protein synthesis for growth

In groups, learners are guided to:
- Discuss functions of organelles: nucleus (control centre), mitochondria (energy production), ribosomes (protein synthesis), chloroplast (photosynthesis), cell membrane (selective permeability)
- Complete tables matching organelles to functions

How do cell organelles work together to keep cells alive?

- Spotlight Biology Learner's Book pg. 43
- Charts showing organelle functions
- Digital resources
- Spotlight Biology Learner's Book pg. 47
- Photomicrographs
- Comparison charts

- Oral questions - Table completion - Written tests

Cell Biology and Biodiversity

Specialised cells in plants

By the end of the lesson, the learner should be able to:
- Identify specialised cells in plants
- Relate structure of specialised plant cells to their functions
- Connect plant cell specialisation to agricultural practices like improving water absorption and photosynthesis efficiency in crops

In groups, learners are guided to:
- Study photomicrographs or diagrams of root hair cells, guard cells, palisade cells, pollen grains
- Discuss adaptations of each cell type to its function
- Draw and label specialised plant cells

How are plant cells modified to perform specific functions?

- Spotlight Biology Learner's Book pg. 48
- Photomicrographs
- Charts of specialised cells

- Oral questions - Drawing assessment - Written tests

Cell Biology and Biodiversity

Specialised cells in animals
Levels of organisation - Cell to organism

By the end of the lesson, the learner should be able to:
- Identify specialised cells in animals
- Relate structure of specialised animal cells to their functions
- Connect cell specialisation to health conditions like anaemia (red blood cells) and muscle weakness (muscle cells)
- Describe levels of organisation in organisms
- Arrange levels from lowest to highest: organelle, cell, tissue, organ, organ system, organism
- Relate levels of organisation to how body systems like digestive and circulatory systems work together to maintain health

In groups, learners are guided to:
- Study photomicrographs or diagrams of muscle cells, nerve cells, red blood cells, white blood cells, sperm cells, ova
- Discuss adaptations of each cell type to its function
- Draw and label specialised animal cells
- Discuss levels of organisation: organelles, cells, tissues, organs, organ systems, organisms
- Identify examples at each level
- Arrange levels in correct order from lowest to highest
- Give examples of tissues in plants and animals

How are animal cells modified to perform specific functions?
How are cells organised to form a complete organism?

- Spotlight Biology Learner's Book pg. 52
- Photomicrographs
- Charts of specialised cells
- Spotlight Biology Learner's Book pg. 55
- Charts showing levels of organisation
- Digital resources

- Oral questions - Drawing assessment - Written assignments
- Oral questions - Sequencing exercises - Written tests

Cell Biology and Biodiversity

Introduction to chemicals of life
Carbohydrates - Monosaccharides and disaccharides

By the end of the lesson, the learner should be able to:
- Explain the meaning of chemicals of life
- Identify the major chemicals of life
- Relate chemicals of life to nutrients in foods consumed daily at home

In groups, learners are guided to:
- Search for information on the meaning of chemicals of life
- Discuss the major chemicals: carbohydrates, lipids, proteins, vitamins, enzymes, water, mineral salts
- Create a flow chart showing chemicals of life

What are chemicals of life and why are they important?

- Spotlight Biology Learner's Book pg. 61
- Digital resources
- Charts
- Spotlight Biology Learner's Book pg. 63
- Food samples
- Charts showing carbohydrate types

- Oral questions - Chart completion - Written assignments

Cell Biology and Biodiversity

Carbohydrates - Polysaccharides

By the end of the lesson, the learner should be able to:
- Describe the composition and properties of polysaccharides
- Explain the functions of starch, glycogen, cellulose, and chitin
- Relate polysaccharides to storage foods like potatoes, cassava, and structural materials like wood and insect shells

In groups, learners are guided to:
- Discuss polysaccharides: starch, glycogen, cellulose, chitin
- Explain properties: not sweet, mostly insoluble, do not crystallise
- Discuss functions: energy storage (starch, glycogen), structural support (cellulose, chitin)

How do plants and animals store carbohydrates?

- Spotlight Biology Learner's Book pg. 65
- Samples of starchy foods
- Charts

- Oral questions - Written tests - Observation

Cell Biology and Biodiversity

Lipids - Composition and properties
Lipids - Functions and Proteins

By the end of the lesson, the learner should be able to:
- Describe the composition and properties of lipids
- Investigate properties of lipids through experiments
- Relate lipids to cooking oils, butter, and body fat that provides insulation and energy storage

In groups, learners are guided to:
- Investigate physical state of cooking fat and oil
- Test solubility of lipids in water and ethanol
- Perform grease spot test
- Discuss composition: fatty acids and glycerol forming triglycerides

What are the properties of fats and oils?

- Spotlight Biology Learner's Book pg. 66
- Cooking oil, cooking fat, ethanol
- Filter paper, test tubes
- Spotlight Biology Learner's Book pg. 68
- Food samples rich in protein
- Charts

- Practical assessment - Observation - Written assignments

Cell Biology and Biodiversity

Enzymes - Properties and functions
Vitamins and mineral salts

By the end of the lesson, the learner should be able to:
- Describe the properties of enzymes
- Explain the functions of enzymes in living organisms
- Relate enzymes to digestion of food in the stomach and use of enzymes in laundry detergents

In groups, learners are guided to:
- Search for information on enzymes
- Discuss properties: protein in nature, destroyed by high temperatures and extreme pH, specific to substrates, remain unchanged after reaction
- Explain enzyme-substrate specificity using lock and key model

How do enzymes help in digestion of food?

- Spotlight Biology Learner's Book pg. 70
- Charts showing enzyme action
- Digital resources
- Spotlight Biology Learner's Book pg. 72
- Pictures of foods
- Charts of vitamins and minerals

- Oral questions - Written tests - Diagrams

Cell Biology and Biodiversity

Water - Properties and functions
Testing for starch and reducing sugars
Testing for non-reducing sugars and proteins

By the end of the lesson, the learner should be able to:
- Describe the properties of water
- Explain the functions of water in living organisms
- Relate water functions to daily needs like drinking, sweating for cooling, and transport of nutrients in blood
- Test for the presence of non-reducing sugars in food substances
- Test for the presence of proteins using Biuret test
- Apply food tests to verify nutritional claims on food packaging labels

In groups, learners are guided to:
- Investigate properties of water: colourless, odourless, density, boiling point
- Discuss functions: solvent, transport medium, cooling through sweating, medium for chemical reactions, osmoregulation
- Perform test for non-reducing sugars using hydrolysis with dilute HCl followed by Benedict's test
- Perform Biuret test for proteins: purple/violet colour indicates presence
- Record and interpret results

Why is water essential for survival of living organisms?
How can non-reducing sugars and proteins be detected in food?

- Spotlight Biology Learner's Book pg. 76
- Distilled water, beakers
- Thermometer, heat source
- Spotlight Biology Learner's Book pg. 79
- Iodine solution, Benedict's solution
- Food samples, test tubes, heat source
- Spotlight Biology Learner's Book pg. 82
- Benedict's solution, dilute HCl
- Sodium hydroxide, copper sulphate solution

- Practical assessment - Oral questions - Written tests
- Practical assessment - Observation - Written reports

Cell Biology and Biodiversity

Testing for lipids and vitamin C

By the end of the lesson, the learner should be able to:
- Test for the presence of lipids using grease spot and emulsion tests
- Test for the presence of vitamin C using DCPIP
- Apply lipid and vitamin tests to evaluate nutritional quality of cooking oils and fruit juices

In groups, learners are guided to:
- Perform grease spot test: translucent spot indicates lipids
- Perform emulsion test: white emulsion indicates lipids
- Perform DCPIP test for vitamin C: decolourisation indicates presence
- Compare vitamin C content in different fruits

How can lipids and vitamin C be detected in food substances?

- Spotlight Biology Learner's Book pg. 84
- Filter paper, ethanol, DCPIP
- Cooking oil, fruit juices

- Practical assessment - Observation - Written reports

Cell Biology and Biodiversity

Presence of enzymes and factors affecting enzyme activity

By the end of the lesson, the learner should be able to:
- Investigate presence of catalase enzyme in living tissues
- Determine factors affecting enzyme activity
- Relate enzyme activity to food spoilage, digestion efficiency, and industrial enzyme use in brewing and baking

In groups, learners are guided to:
- Investigate presence of catalase using hydrogen peroxide and liver/potato
- Investigate effect of temperature on enzyme activity
- Investigate effect of pH on enzyme activity
- Investigate effect of substrate and enzyme concentration

What factors affect how fast enzymes work?

- Spotlight Biology Learner's Book pg. 87
- Hydrogen peroxide, liver, potato
- Amylase, starch, pepsin, egg albumen

- Practical assessment - Observation - Written reports

Anatomy and Physiology of Plants

Nutrition - Autotrophic nutrition

By the end of the lesson, the learner should be able to:
- Define autotrophic nutrition
- Describe how autotrophic plants manufacture their own food
- Recognize the importance of green plants in food production for ecosystems

In groups, learners are guided to:
- Search for information on types of nutrition in plants from print and non-print resources
- Discuss the meaning of autotrophic nutrition and share with peers
- Use digital devices to watch videos on how plants manufacture food

How do plants obtain their food?

- Spotlight Biology Learner's Book Grade 10 pg. 98
- Digital resources
- Charts showing plant nutrition

- Oral questions - Observation - Written assignments

Anatomy and Physiology of Plants

Nutrition - Heterotrophic nutrition (Parasitic mode)
Nutrition - Heterotrophic nutrition (Saprophytic mode)
Nutrition - Heterotrophic nutrition (Symbiotic mode)
Nutrition - Heterotrophic nutrition (Insectivorous mode)

By the end of the lesson, the learner should be able to:
- Explain parasitic mode of nutrition in plants
- Identify examples of parasitic plants such as Cuscuta and witchweed
- Relate how parasitic plants affect crop yields in agricultural settings
- Explain symbiotic mode of nutrition in plants
- Describe nitrogen fixation in root nodules of legumes
- Apply knowledge of symbiosis to improve soil fertility through crop rotation in farms

In groups, learners are guided to:
- Study photographs of parasitic plants like Cuscuta
- Discuss how haustoria penetrate host plants to extract nutrients
- Search for information on effects of parasitic plants on host plants
- Study photographs of root nodules in bean plants
- Discuss the relationship between Rhizobium bacteria and leguminous plants
- Search for information on how symbiosis benefits both organisms

How do parasitic plants obtain nutrients from their hosts?
How do leguminous plants benefit from bacteria in their root nodules?

- Spotlight Biology Learner's Book Grade 10 pg. 98
- Pictures of parasitic plants
- Digital resources
- Spotlight Biology Learner's Book Grade 10 pg. 99
- Pictures of saprophytic plants
- Reference books
- Spotlight Biology Learner's Book Grade 10 pg. 100
- Fresh specimens of legume roots with nodules
- Charts showing symbiosis
- Spotlight Biology Learner's Book Grade 10 pg. 101
- Pictures of insectivorous plants
- Video clips
- Digital resources

- Oral questions - Observation - Group presentations
- Observation - Oral questions - Written tests

Anatomy and Physiology of Plants

Nutrition - Structure of the chloroplast
Nutrition - Functions of chloroplast parts

By the end of the lesson, the learner should be able to:
- Describe the structure of a chloroplast
- Draw and label the parts of a chloroplast
- Recognize chloroplasts as the powerhouses that convert sunlight to food in plants

In groups, learners are guided to:
- Study photomicrographs showing chloroplast structure
- Draw well-labelled diagrams of chloroplasts
- Discuss the parts of chloroplast including thylakoids, grana, stroma and double membrane

What are the structural components of a chloroplast?

- Spotlight Biology Learner's Book Grade 10 pg. 103
- Photomicrographs of chloroplasts
- Charts
- Digital resources
- Spotlight Biology Learner's Book Grade 10 pg. 104
- Models of chloroplasts
- Reference books

- Observation - Oral questions - Practical assessment

Anatomy and Physiology of Plants

Nutrition - Introduction to photosynthesis
Nutrition - Light stage of photosynthesis

By the end of the lesson, the learner should be able to:
- Define photosynthesis
- State the raw materials and products of photosynthesis
- Relate photosynthesis to how plants provide food and oxygen essential for human survival

In groups, learners are guided to:
- Discuss the meaning of photosynthesis
- Write the word equation for photosynthesis
- Identify conditions necessary for photosynthesis (sunlight and chlorophyll)

What is photosynthesis and why is it important?

- Spotlight Biology Learner's Book Grade 10 pg. 104
- Charts showing photosynthesis equation
- Digital resources
- Spotlight Biology Learner's Book Grade 10 pg. 105
- Animations/video clips
- Charts

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Nutrition - Dark stage of photosynthesis

By the end of the lesson, the learner should be able to:
- Describe the dark stage (carbon fixation) of photosynthesis
- Explain how glucose is formed from carbon dioxide and hydrogen ions
- Relate glucose production to how plants store energy that later becomes our food source

In groups, learners are guided to:
- Watch animations showing the dark stage of photosynthesis
- Discuss the role of enzymes in the stroma during carbon fixation
- Compare and contrast light and dark stages of photosynthesis

How is glucose formed during the dark stage of photosynthesis?

- Spotlight Biology Learner's Book Grade 10 pg. 106
- Animations/video clips
- Flow charts
- Digital resources

- Written assignments - Oral questions - Observation

Anatomy and Physiology of Plants

Nutrition - Importance of photosynthesis to plants
Nutrition - Importance of photosynthesis to the environment

By the end of the lesson, the learner should be able to:
- Explain the significance of photosynthesis to plants
- Describe how photosynthesis provides food and energy for plant growth
- Connect photosynthesis to food security and agricultural productivity
- Explain the significance of photosynthesis to the environment
- Describe how photosynthesis releases oxygen and reduces carbon dioxide levels
- Relate photosynthesis to combating climate change and maintaining breathable air for all living organisms

In groups, learners are guided to:
- Discuss the importance of photosynthesis in providing food for plants
- Search for information on how photosynthesis supports plant growth and development
- Share findings with classmates for peer assessment
- Discuss the role of photosynthesis in producing oxygen for respiration
- Explain how plants absorb carbon dioxide and help control climate change
- Encourage tree planting as a way of maximizing benefits of photosynthesis

Why is photosynthesis essential for plant survival?
How does photosynthesis benefit the environment and living organisms?

- Spotlight Biology Learner's Book Grade 10 pg. 106
- Reference books
- Digital resources
- Spotlight Biology Learner's Book Grade 10 pg. 107
- Charts
- Digital resources
- Reference books

- Oral questions - Written assignments - Group presentations
- Written tests - Oral questions - Project work

Anatomy and Physiology of Plants

Nutrition - Importance of photosynthesis to the environment

By the end of the lesson, the learner should be able to:
- Explain the significance of photosynthesis to the environment
- Describe how photosynthesis releases oxygen and reduces carbon dioxide levels
- Relate photosynthesis to combating climate change and maintaining breathable air for all living organisms

In groups, learners are guided to:
- Discuss the role of photosynthesis in producing oxygen for respiration
- Explain how plants absorb carbon dioxide and help control climate change
- Encourage tree planting as a way of maximizing benefits of photosynthesis

How does photosynthesis benefit the environment and living organisms?

- Spotlight Biology Learner's Book Grade 10 pg. 107
- Charts
- Digital resources
- Reference books

- Written tests - Oral questions - Project work

Anatomy and Physiology of Plants

Transport - External structures of a plant

By the end of the lesson, the learner should be able to:
- Identify the external parts of a plant (roots, stem, leaves)
- Describe the functions of each external plant part
- Relate plant structures to how plants obtain water, nutrients and produce food for human consumption

In groups, learners are guided to:
- Examine freshly uprooted herbaceous plants
- Draw well-labelled diagrams showing parts of a plant
- Discuss the functions of roots, stems and leaves in transport

What are the main parts of a plant and their functions in transport?

- Spotlight Biology Learner's Book Grade 10 pg. 110
- Fresh plant specimens
- Hand lens
- Charts

- Observation - Oral questions - Practical assessment

Anatomy and Physiology of Plants

Transport - Adaptations of roots to their functions

By the end of the lesson, the learner should be able to:
- Describe the adaptations of roots to their functions
- Explain the role of root hairs in absorption of water and mineral salts
- Connect root structure to how plants access groundwater even during dry seasons

In groups, learners are guided to:
- Study diagrams of longitudinal sections of root tips
- Discuss how root hairs increase surface area for absorption
- Examine fresh specimens of roots under a hand lens

How are roots adapted for absorption of water and mineral salts?

- Spotlight Biology Learner's Book Grade 10 pg. 111
- Fresh root specimens
- Hand lens
- Charts showing root structure

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Adaptations of stems and leaves
Transport - Arrangement of vascular tissues in dicotyledonous roots

By the end of the lesson, the learner should be able to:
- Describe the adaptations of stems and leaves to their functions
- Explain how vascular tissues in stems transport materials
- Relate leaf structure to how plants capture sunlight for food production
- Describe the arrangement of vascular tissues in dicotyledonous roots
- Prepare and observe transverse sections of dicotyledonous roots
- Identify how vascular arrangement enables efficient water transport in common crops like beans

In groups, learners are guided to:
- Discuss how stems contain xylem and phloem for transport
- Explain adaptations of leaves including broad lamina and waxy cuticle
- Search for information on structural adaptations of plant parts
- Cut thin transverse sections of bean roots
- Mount sections on slides and observe under microscope
- Draw and label cross-sections of dicotyledonous roots

How are stems and leaves adapted for their functions?
How are vascular tissues arranged in dicotyledonous roots?

- Spotlight Biology Learner's Book Grade 10 pg. 111
- Plant specimens
- Charts
- Digital resources
- Spotlight Biology Learner's Book Grade 10 pg. 113
- Bean seedlings
- Light microscope
- Scalpels
- Slides and cover slips

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

Anatomy and Physiology of Plants

Transport - Arrangement of vascular tissues in monocotyledonous roots

By the end of the lesson, the learner should be able to:
- Describe the arrangement of vascular tissues in monocotyledonous roots
- Compare vascular arrangement in monocot and dicot roots
- Distinguish between maize and bean root structures commonly found in Kenyan farms

In groups, learners are guided to:
- Cut thin transverse sections of maize roots
- Mount sections on slides and observe under microscope
- Compare and contrast monocot and dicot root structures

How does vascular tissue arrangement differ in monocot and dicot roots?

- Spotlight Biology Learner's Book Grade 10 pg. 114
- Maize seedlings
- Light microscope
- Scalpels
- Slides and cover slips

- Practical assessment - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Arrangement of vascular tissues in dicotyledonous stems

By the end of the lesson, the learner should be able to:
- Describe the arrangement of vascular tissues in dicotyledonous stems
- Observe permanent slides of dicotyledonous stems
- Relate vascular bundle arrangement to growth patterns in trees and shrubs

In groups, learners are guided to:
- Mount permanent slides of dicotyledonous stems on microscope
- Observe and draw cross-sections of dicotyledonous stems
- Identify epidermis, cortex, vascular bundles and pith

How are vascular tissues arranged in dicotyledonous stems?

- Spotlight Biology Learner's Book Grade 10 pg. 115
- Permanent slides
- Light microscope
- Charts

- Practical assessment - Oral questions - Observation

Anatomy and Physiology of Plants

Transport - Arrangement of vascular tissues in monocotyledonous stems

By the end of the lesson, the learner should be able to:
- Describe the arrangement of vascular tissues in monocotyledonous stems
- Compare vascular arrangement in monocot and dicot stems
- Differentiate grass and maize stems from tree stems based on their internal structure

In groups, learners are guided to:
- Mount permanent slides of monocotyledonous stems on microscope
- Compare scattered vascular bundles in monocots with ring arrangement in dicots
- Discuss differences and similarities between monocot and dicot stems

How does vascular tissue arrangement differ in monocot and dicot stems?

- Spotlight Biology Learner's Book Grade 10 pg. 116
- Permanent slides
- Light microscope
- Charts

- Written tests - Oral questions - Practical assessment

Anatomy and Physiology of Plants

Transport - Arrangement of vascular tissues in monocotyledonous stems

By the end of the lesson, the learner should be able to:
- Describe the arrangement of vascular tissues in monocotyledonous stems
- Compare vascular arrangement in monocot and dicot stems
- Differentiate grass and maize stems from tree stems based on their internal structure

In groups, learners are guided to:
- Mount permanent slides of monocotyledonous stems on microscope
- Compare scattered vascular bundles in monocots with ring arrangement in dicots
- Discuss differences and similarities between monocot and dicot stems

How does vascular tissue arrangement differ in monocot and dicot stems?

- Spotlight Biology Learner's Book Grade 10 pg. 116
- Permanent slides
- Light microscope
- Charts

- Written tests - Oral questions - Practical assessment

Anatomy and Physiology of Plants

Transport - Mechanisms of water absorption

By the end of the lesson, the learner should be able to:
- Explain mechanisms of water and mineral salt uptake in plants
- Describe the role of osmosis in water absorption by root hairs
- Connect plant water absorption to how irrigation helps crops grow in dry areas

In groups, learners are guided to:
- Search for information on mechanisms of water uptake in plants
- Discuss how water moves from soil into root hair cells by osmosis
- Watch animations on water movement from roots to xylem

How do plants absorb water from the soil?

- Spotlight Biology Learner's Book Grade 10 pg. 117
- Animations/video clips
- Charts
- Digital resources

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Root pressure and capillarity

By the end of the lesson, the learner should be able to:
- Explain root pressure as a force that moves water up the plant
- Describe capillarity and its role in water transport
- Relate root pressure to early morning water droplets (guttation) observed on plant leaves

In groups, learners are guided to:
- Discuss how endodermis cells create root pressure
- Explain cohesion and adhesion forces in capillarity
- Search for information on forces that move water up the xylem

What forces move water from roots up through the plant?

- Spotlight Biology Learner's Book Grade 10 pg. 118
- Charts
- Reference books
- Digital resources

- Oral questions - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Transpiration pull

By the end of the lesson, the learner should be able to:
- Explain transpiration pull as the main force for water movement in plants
- Describe how water evaporation from leaves creates a pulling force
- Connect transpiration to how tall trees like eucalyptus transport water to their topmost leaves

In groups, learners are guided to:
- Discuss how transpiration creates an osmotic gradient in xylem
- Explain the role of cohesion in maintaining continuous water column
- Watch animations showing transpiration pull mechanism

How does transpiration pull water up through tall plants?

- Spotlight Biology Learner's Book Grade 10 pg. 119
- Animations
- Charts
- Digital resources

- Written tests - Oral questions - Observation

Anatomy and Physiology of Plants

Transport - Demonstrating water uptake in plants
Transport - Demonstrating transpiration

By the end of the lesson, the learner should be able to:
- Demonstrate water uptake in plants using coloured dyes
- Observe the pathway of water movement through plant tissues
- Visualize how water travels through plants similar to how blood flows through human veins
- Define transpiration
- Demonstrate transpiration using potted plants
- Connect transpiration to how plants cool themselves similar to how sweating cools our bodies

In groups, learners are guided to:
- Place cut stems of kales or cabbage in beakers with coloured dye
- Observe colour changes in leaves after 40 minutes
- Cut transverse sections to observe dye distribution in vascular tissues
- Cover potted plants with transparent polythene bags
- Observe water droplets forming inside the bags after 6 hours
- Discuss the importance of transpiration in cooling plants

How can we demonstrate the pathway of water uptake in plants?
What is transpiration and how can it be demonstrated?

- Spotlight Biology Learner's Book Grade 10 pg. 119
- Kales or cabbage leaves
- Blue and red dyes
- Beakers
- Scalpels
- Spotlight Biology Learner's Book Grade 10 pg. 120
- Potted plants
- Transparent polythene bags
- Sunlight

- Practical assessment - Observation - Oral questions

Anatomy and Physiology of Plants

Transport - Environmental factors affecting transpiration (Temperature and light)

By the end of the lesson, the learner should be able to:
- Investigate how temperature and light intensity affect transpiration rate
- Use a potometer to measure rate of water uptake
- Relate these factors to why plants wilt faster on hot sunny days

In groups, learners are guided to:
- Set up potometer with leafy shoots
- Place set-ups near electric heater and in bright sunshine
- Record time taken for air bubble to move along capillary tube

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

- Spotlight Biology Learner's Book Grade 10 pg. 121
- Potometer
- Leafy twigs
- Electric heater
- Stopwatch

- Practical assessment - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Environmental factors affecting transpiration (Temperature and light)

By the end of the lesson, the learner should be able to:
- Investigate how temperature and light intensity affect transpiration rate
- Use a potometer to measure rate of water uptake
- Relate these factors to why plants wilt faster on hot sunny days

In groups, learners are guided to:
- Set up potometer with leafy shoots
- Place set-ups near electric heater and in bright sunshine
- Record time taken for air bubble to move along capillary tube

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

- Spotlight Biology Learner's Book Grade 10 pg. 121
- Potometer
- Leafy twigs
- Electric heater
- Stopwatch

- Practical assessment - Written assignments - Observation

Anatomy and Physiology of Plants

Transport - Environmental factors affecting transpiration (Wind and humidity)

By the end of the lesson, the learner should be able to:
- Investigate how wind and humidity affect transpiration rate
- Explain the effect of air currents and moisture on water loss
- Connect these factors to why laundry dries faster on windy days versus humid days

In groups, learners are guided to:
- Set up potometer near a running fan
- Cover shoots with polythene bags to increase humidity
- Compare rates of water uptake under different conditions

How do wind and humidity affect the rate of transpiration?

- Spotlight Biology Learner's Book Grade 10 pg. 122
- Potometer
- Fan
- Polythene bags
- Stopwatch

- Practical assessment - Oral questions - Written tests

Anatomy and Physiology of Plants

Transport - Structural factors affecting transpiration
Transport - Mechanism of translocation

By the end of the lesson, the learner should be able to:
- Explain how leaf structure affects transpiration rate
- Describe adaptations that reduce or increase water loss
- Relate plant structural adaptations to survival in different climates like deserts and wetlands
- Define translocation
- Describe how manufactured food is transported in plants
- Relate translocation to how fruits develop and storage organs like potatoes and carrots store food

In groups, learners are guided to:
- Compare transpiration rates in plants with different leaf sizes
- Discuss effects of cuticle thickness, stomata number and sunken stomata
- Investigate transpiration in leaves with different structural features
- Search for information on translocation in plants
- Discuss cytoplasmic streaming, mass flow and active transport
- Watch animations showing movement of food through phloem

How do leaf structural features affect the rate of transpiration?
How is manufactured food transported from leaves to other parts of the plant?

- Spotlight Biology Learner's Book Grade 10 pg. 124
- Leaves of different plants
- Potometer
- Hand lens
- Spotlight Biology Learner's Book Grade 10 pg. 126
- Animations
- Charts
- Digital resources

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

Anatomy and Physiology of Plants

Transport - Bark ringing experiment

By the end of the lesson, the learner should be able to:
- Demonstrate translocation through bark ringing experiment
- Explain why the region above the ring swells
- Connect this experiment to why girdling by animals or humans can kill trees

In groups, learners are guided to:
- Remove a complete ring of bark from a woody plant stem
- Observe changes above and below the ring over four weeks
- Discuss how accumulation of sugars causes swelling above the ring

What evidence supports translocation through the phloem?

- Spotlight Biology Learner's Book Grade 10 pg. 127
- Woody plant
- Knife/scalpel
- Protective clothing

- Practical assessment - Observation - Oral questions

Anatomy and Physiology of Plants
Anatomy and Physiology of Animals

Transport - Importance of transport in plants
Structure of mouthparts of insects

By the end of the lesson, the learner should be able to:
- Explain the significance of transport in plants
- Describe how transport supports plant growth and development
- Connect plant transport to agricultural practices like proper watering and fertilizer application

In groups, learners are guided to:
- Discuss how water transport maintains turgor pressure
- Explain how transpiration cools plants
- Search for information on significance of transport in plants

Why is transport important for plant survival and growth?

- Spotlight Biology Learner's Book Grade 10 pg. 128
- Charts
- Reference books
- Digital resources
- Spotlight Biology Grade 10 pg. 153
- Protective clothing
- Collection jars
- Hand lens
- Pair of forceps

- Written tests - Oral questions - Group presentations

Anatomy and Physiology of Animals

Structure of mouthparts - Biting and chewing mouthparts

By the end of the lesson, the learner should be able to:
- Describe the structure of biting and chewing mouthparts in locusts, grasshoppers and cockroaches
- Label the parts of biting and chewing mouthparts correctly
- Recognise how mouthpart structures help insects survive in their habitats

In groups, learners are guided to:
- Study diagrams/charts showing mouthparts of grasshoppers
- Identify and label labrum, mandibles, maxillae and labium
- Draw well-labelled diagrams of mouthparts

How are the mouthparts of locusts, grasshoppers and cockroaches structured?

- Spotlight Biology Grade 10 pg. 154
- Charts showing mouthparts
- Photomicrographs
- Digital resources

- Labelled diagrams - Oral questions - Written assignments

Anatomy and Physiology of Animals

Structure of mouthparts - Piercing and sucking mouthparts (Tsetse fly)
Structure of mouthparts - Piercing and sucking mouthparts (Mosquito)
Structure of mouthparts - Siphoning mouthparts (Butterfly/Moth)
Adaptations of mouthparts to feeding modes

By the end of the lesson, the learner should be able to:
- Describe the structure of piercing and sucking mouthparts in tsetse flies
- Illustrate the mouthparts of a tsetse fly
- Connect the study of tsetse fly mouthparts to disease transmission and public health
- Describe the structure of siphoning mouthparts in butterflies and moths
- Illustrate the proboscis and its coiling mechanism
- Connect butterfly feeding to pollination and food production

In groups, learners are guided to:
- Search for information on mouthparts of tsetse fly from print and non-print resources
- Watch animations/videos on tsetse fly mouthparts
- Draw and label mouthparts including labium, labrum, mandibles, maxillae and hypopharynx
- Search for information on butterfly mouthparts
- Watch animations showing how proboscis functions
- Draw and label the proboscis structure

How are tsetse fly mouthparts adapted for piercing and sucking?
How is the butterfly's proboscis adapted for nectar feeding?

- Spotlight Biology Grade 10 pg. 156
- Digital devices
- Videos/animations
- Charts
- Spotlight Biology Grade 10 pg. 157
- Charts
- Photomicrographs
- Digital resources
- Spotlight Biology Grade 10 pg. 156
- Videos/animations
- Charts
- Digital devices
- Spotlight Biology Grade 10 pg. 157
- Digital resources
- Reference books

- Oral questions - Labelled drawings - Written tests
- Oral questions - Labelled drawings - Written assignments

Anatomy and Physiology of Animals

Illustrating mouthparts in different insects
Observing different birds and their feeding habits

By the end of the lesson, the learner should be able to:
- Draw well-labelled diagrams of mouthparts of different insects
- Differentiate mouthparts based on feeding modes
- Relate accurate biological illustration skills to careers in scientific research

In groups, learners are guided to:
- Draw labelled diagrams of mouthparts of housefly, mosquito, locust, bee, tsetse fly and butterfly
- Use charts provided by teacher as reference
- Share drawings with classmates for peer review

How different are the structures in the mouthparts of insects?

- Spotlight Biology Grade 10 pg. 158
- Charts
- Drawing materials
- Coloured pencils
- Spotlight Biology Grade 10 pg. 159
- Binoculars
- Digital camera
- Protective clothing
- Writing materials

- Practical assessment - Peer assessment - Labelled drawings

Anatomy and Physiology of Animals

Structure of beaks - Grain/seed eaters and nectar feeders

By the end of the lesson, the learner should be able to:
- Describe the structure of beaks of grain/seed eaters and nectar feeders
- Relate beak structure to feeding habits
- Connect bird beak diversity to food security through seed dispersal

In groups, learners are guided to:
- Study pictures of beaks of sparrows, parrots, hummingbirds and sunbirds
- Discuss how beaks are adapted to feeding modes
- Draw and label beaks of grain eaters and nectar feeders

How are beaks of grain eaters and nectar feeders adapted to their diets?

- Spotlight Biology Grade 10 pg. 160
- Charts
- Photographs
- Digital resources

- Oral questions - Labelled drawings - Written assignments

Anatomy and Physiology of Animals

Structure of beaks - Fish eaters, flesh eaters and filter feeders

By the end of the lesson, the learner should be able to:
- Describe the structure of beaks of fish eaters, flesh eaters and filter feeders
- Compare adaptations of different bird beaks
- Relate beak adaptations to ecosystem balance and food chains

In groups, learners are guided to:
- Study photographs of beaks of herons, kingfishers, eagles, vultures, flamingos and ducks
- Discuss adaptations of each beak type to feeding mode
- Complete a table relating beak structure to mode of feeding

How do the beaks of carnivorous and filter-feeding birds differ?

- Spotlight Biology Grade 10 pg. 161
- Charts
- Photographs
- Digital resources

- Written tests - Oral questions - Table completion

Anatomy and Physiology of Animals

Structure of beaks - Multipurpose feeders, woodchippers, insect and fruit eaters

By the end of the lesson, the learner should be able to:
- Describe the structure of beaks of multipurpose feeders, woodchippers, insect and fruit eaters
- Illustrate different types of bird beaks
- Connect bird diversity to forest conservation and pest control in farming

In groups, learners are guided to:
- Study photographs of beaks of crows, domestic fowl, woodpeckers, warblers, flycatchers, hornbills and toucans
- Discuss how each beak is adapted to its feeding mode
- Draw and label different beak types

How are the beaks of woodchippers and fruit eaters adapted to their diets?

- Spotlight Biology Grade 10 pg. 162
- Charts
- Photographs
- Digital resources

- Oral questions - Labelled drawings - 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
- Discuss how feeding diversity promotes ecological balance
- Apply understanding of feeding diversity to biodiversity conservation in local ecosystems

In groups, learners are guided to:
- Discuss importance of diversity in feeding modes using flash cards
- Relate feeding diversity to pollination, seed dispersal, pest control and nutrient recycling
- Design posters on importance of feeding diversity

What would happen if all insects and birds had the same mode of feeding?

- Spotlight Biology Grade 10 pg. 164
- Flash cards
- Manila papers
- Marker pens

- Group discussions - Poster presentations - Written assignments