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1. List down the raw materials for photosynthesis? (1 Mark)
2. Specify what is the role of bile juice in the process of digestion? (1 Mark)
3. Name the respiratory organ in fish and earthworm. (1 Mark)
4. Name the types of blood vessels used for the transportation of blood. (1 Mark)
5. What is dialysis? (1 Mark)
6. How is respiration in plants and respiration in animals different? (2 Marks)
7. Draw the labeled diagram of the human digestive system. (2 Marks)
8. How are alveoli designed and why? (2 Marks)
9. Define excretion. What are the two organs in human beings that act as accessory excretory organs? (2 Marks)
10. State the role of the following (i) Chloroplasts (ii) Diaphragm (iii) Larynx (3 Marks)
11. Give reasons for the following:
(i) The glottis is guarded by epiglottis.
(ii) It is said to not speak while eating.
(iii) Walls of trachea are supported by cartilage rings. (3 Marks)
12. Leaves of a potted plant were coated with wax to block the stomata.
Will this plant remain alive and healthy for long? State three reasons for your answer. (3 Marks)
13. Describe the process and importance of double circulation in humans. (3 Marks)
14. (i) Name the blood vessel that brings oxygenated blood to the human heart. (5 Marks)
(ii) Which chamber of human heart receives oxygenated blood?
(iii) Explain how oxygenated blood from this chamber is sent to all parts of the body.​

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