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CSEE 🇹🇿 NECTA ✓ Official NECTA answers

Biology · Paper 1 · 2025

20 questions

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Questions (20)

Section A

1. 1 mark

Farmers at Mtakuja village observed a continuous decrease in the amount of beans yield in their farms. How is this step in the scientific process referred?

A. Experimentation
B. Problem identification
C. Data collection
D. Hypothesis
E. Conclusion

Section B

3. 6 marks

Mkutano villagers use traditional methods to process, preserve and store variety of foods they obtain from their daily activities. Outline six advantages of such methods.

(none) Outline six advantages of such methods. 6 mk

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4. 7 marks

With the aid of a labeled diagram, describe the events which take place during the prophase stage of mitosis.

(none) With the aid of a labeled diagram, describe the events which take place during the prophase stage of mitosis. 7 mk

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5. 6 marks

How are the cardiac muscles adapted to perform their roles? Give six points.

(none) How are the cardiac muscles adapted to perform their roles? Give six points. 6 mk

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6. 6 marks

Bacteria, Amoeba and Non-flowering plants reproduce asexually. Explain three merits and three demerits of the type of reproduction exhibited by these organisms.

(none) Explain three merits and three demerits of the type of reproduction exhibited by these organisms. 6 mk

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7. 7 marks

A man with heterozygous blood group A married a woman with heterozygous blood group B. One among their offsprings produced was blood group 0. Use genetic cross to show the probability of producing such offspring.

(none) Use genetic cross to show the probability of producing such offspring. 7 mk

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8. 9 marks

By using example, explain how each of the following provide evidences for organic evolution. Give three points for each.

(a) Fossil records 3 mk
(b) Comparative embryology 3 mk

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Section C

9. 6 marks

You are invited as a guest speaker in a youth meeting to fight against drug abuse. Recommend six preventive and control measures you would address to them.

(none) Recommend six preventive and control measures you would address to them. 6 mk

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10. 8 marks

Matatu villagers have appointed you as a chair person for campaign against gonorrhoea prevention. Explain three ways of transmission and five measures that will help them to prevent the disease.

(none) Explain three ways of transmission and five measures that will help them to prevent the disease. 8 mk

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11. 5 marks

Analyse five environmental factors which affect the rate of transpiration in plants.

(none) Analyse five environmental factors which affect the rate of transpiration in plants. 5 mk

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