Rickets in children and osteomalacia in adults are conditions caused by lack of

The following statements are either correct or not correct. Write TRUE if the statement is correct or FALSE if the statement is not correct.

1. A group of interdependent organisms living in an environment is called a community. (1 mk)
2. A person with blood group AB is a universal donor. (1 mk)
3. Animal cells have no chloroplasts. (1 mk)
4. Before the blood returns to the heart it has to be oxygenated in the liver. (1 mk)
5. Green plants are decomposers. (1 mk)
6. Maintaining personal hygiene reduces the risk of infection. (1 mk)
7. Malaria is transmitted by a plasmodium. (1 mk)
8. Proteins in the diet are needed for growth and repair. (1 mk)
9. Transpiration is not a necessary process to plants. (1 mk)
10. Valves in veins prevent the backflow of blood. (1 mk)

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Match the item in List A with the correct item in List B by writing its letter below the number of the item in List A in the table provided.

1. A disorder of the digestive system (1 mk)
2. An enzyme that converts lipids to fatty acids and glycerol (1 mk)
3. An enzyme that converts starch to maltose (1 mk)
4. It contains an acidic medium for digestion (1 mk)
5. Sites for dumping waste and covering it with soil (1 mk)
6. The first part of the small intestine (1 mk)
7. The process of burning waste until it is completely destroyed (1 mk)
8. The process of turning waste into new products (1 mk)
9. The stomach of this organism have four chambers (1 mk)
10. They have true roots, stems and leaves. (1 mk)

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Define the following terms:

1. Classification (2 mk)
2. Binomial nomenclature (2 mk)

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Mention two disorders of human blood circulatory system.

1. Write three points on the importance of classification. (1 mk)
2. What is blood circulation? (2 mk)
3. Explain three points on the importance of blood circulation in human being. (3 mk)
4. Mention two disorders of human blood circulatory system. (2 mk)
5. Write three points on the importance of classification. (1 mk)
6. Write three points on the importance of classification. (1 mk)

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Explain the importance of gaseous exchange in plants.

1. What do you understand by the term “diffusion”? (2 mk)
2. Explain the importance of gaseous exchange in plants. (3 mk)
3. Name two structures concerned with gaseous exchange in plants. (2 mk)

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Explain two significance of food chains and food webs in real life situation.

1. What is natural environment? (2 mk)
2. Explain two significance of food chains and food webs in real life situation. (4 mk)
3. Explain the importance of the natural environment. (3 mk)

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Differentiate between aerobic and anaerobic respiration.

1. Differentiate between aerobic and anaerobic respiration. (4 mk)
2. What is respiration? (2 mk)
3. Outline four reasons why it is important to study Biology. (4 mk)

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Write an essay on kwashiorkor using the following guidelines: - meaning - cause - symptoms - effects - prevention and control.

1. Prevention and control (1 mk)

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Write an essay on tuberculosis using the following guidelines: - cause - transmission - signs/symptoms - effects - prevention and control.

1. Prevention and control (1 mk)

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