Exercise Solutions Available
Step-by-step answers for all textbook questions in this chapter
Instructions
- Time: 1 hour 30 minutes
- Maximum Marks: 50
- Answer all sections.
Section A — One Mark (10 × 1 = 10 marks)
1. Write the word equation for photosynthesis. 2. Name the tissue that transports water from roots to leaves. 3. What is transpiration? 4. Name the enzyme in gastric juice that digests protein. 5. What is peristalsis? 6. Name the microorganism that causes tuberculosis. 7. What is binary fission? 8. Define zygote. 9. Name one example of vegetative propagation using leaves. 10. Define communicable disease.
Section B — Short Answer (5 × 3 = 15 marks)
Answer any five:
11. Explain the conditions required for photosynthesis. 12. Distinguish between aerobic and anaerobic respiration with equations. 13. Describe digestion in the stomach. 14. Distinguish between bacteria and viruses with two differences. 15. Explain asexual reproduction in plants with three methods and examples. 16. Describe the function of xylem and phloem in transportation. 17. Explain vaccines and their role in disease prevention.
Section C — Long Answer (5 × 5 = 25 marks)
Answer all:
18. (a) Explain photosynthesis in detail. Include the chemical equation, conditions, site of the process, and products formed. OR (b) Describe the process of digestion in humans from mouth to small intestine.
19. (a) Describe the human circulatory system. Explain the structure of the heart and the two circuits of circulation. OR (b) Classify microorganisms into five types. Give characteristics, examples, and one use or harm for each.
20. (a) Explain sexual reproduction in flowering plants. Describe pollination, fertilisation, and fruit/seed formation. OR (b) Describe communicable diseases: name four diseases, their causative organisms, modes of spread, and methods of prevention.
Correction Checklist
- [ ] Photosynthesis equation balanced and complete
- [ ] All biological processes explained with correct terminology
- [ ] Disease table includes causative organism and prevention
- [ ] Diagrams labelled where required