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DSEE 🇹🇿 NECTA ✓ Official NECTA answers

Biology · Paper 1 · 2008

18 questions

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Questions (18)

Section A

1. 3 marks

Define mutation and list three types of gene mutations.

(a) Define mutation. 1 mk
(b) List three types of gene mutations. 2 mk

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2. 4 marks

State four effects of drug abuse on human health.

(none) State four effects of drug abuse on human health. 4 mk

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3. 4 marks

List four differences between prokaryotic and eukaryotic cells.

(none) List four differences between prokaryotic and eukaryotic cells. 4 mk

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4. 4 marks

Give four reasons for conserving biodiversity.

(none) Give four reasons for conserving biodiversity. 4 mk

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5. 4 marks

Mention four methods of asexual reproduction in plants.

(none) Mention four methods of asexual reproduction in plants. 4 mk

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6. 4 marks

State four roles of water in biological systems.

(none) State four roles of water in biological systems. 4 mk

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7. 4 marks

Mention four causes of infertility in women.

(none) Mention four causes of infertility in women. 4 mk

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8. 4 marks

List four apparatus used in preparing food tests in the Biology lab.

(none) List four apparatus used in preparing food tests in the Biology lab. 4 mk

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9. 4 marks

Outline four advantages of co-operative learning in Biology.

(none) Outline four advantages of co-operative learning in Biology. 4 mk

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10. 4 marks

Mention four challenges of teaching Biology in schools with limited resources.

(none) Mention four challenges of teaching Biology in schools with limited resources. 4 mk

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Section B

11. 15 marks

Describe the carbon cycle and its significance to living organisms.

(a) Describe the carbon cycle. 10 mk
(b) Explain its significance to living organisms. 5 mk

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12. 15 marks

Explain the process of fertilization and embryo development in flowering plants.

(a) Explain the process of fertilization in flowering plants. 7 mk
(b) Explain the process of embryo development in flowering plants. 8 mk

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13. 15 marks

Discuss five advantages and five disadvantages of using chemical contraceptives.

(a) Discuss five advantages of using chemical contraceptives. 7 mk
(b) Discuss five disadvantages of using chemical contraceptives. 8 mk

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14. 15 marks

Explain the structure and function of the human kidney.

(a) Explain the structure of the human kidney. 6 mk
(b) Explain the function of the human kidney. 9 mk

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Section C

15. 15 marks

Describe six criteria to consider when selecting teaching aids in Biology.

(none) Describe six criteria to consider when selecting teaching aids in Biology. 15 mk

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16. 15 marks

Explain six effective classroom management techniques for teaching Biology.

(none) Explain six effective classroom management techniques for teaching Biology. 15 mk

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17. 15 marks

Describe six ways of evaluating Biology practical skills in the classroom.

(none) Describe six ways of evaluating Biology practical skills in the classroom. 15 mk

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18. 15 marks

Discuss six methods for teaching students with mixed abilities in a Biology class.

(none) Discuss six methods for teaching students with mixed abilities in a Biology class. 15 mk

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