CSEE
Biology · Paper 2B · 2022
2 questions 🇹🇿 NECTA ✓ Official NECTA answers
CSEE
🇹🇿 NECTA
✓ Official NECTA answers
Biology · Paper 2B · 2022
2 questions
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200 TZS
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Questions (2)
Section A
1.
25 marks
You are provided with specimens A, B and specimen C.
(a)
Observe carefully the displayed reproductive system in the specimen A, then draw a well labelled diagram of the reproductive system only.
5 mk
(b)
Carefully remove the sepals, petals and completely peel off the stamen tube to fully display carpel of specimen B, then draw a well labelled diagram of the carpel.
5 mk
(c)
State four similar functions performed by reproductive system in diagram 1(a) and the carpel in 1(b). Present your work under criteria shown in the following table:
8 mk
(d)
What is the type of reproduction exhibited by the plant which specimen C was taken? Give a reason to support your answer.
3 mk
(e)
Briefly explain how the specimen C is propagated for reproduction of new plant.
2 mk
(f)
In what ways the products from the specimen C is useful to human being. Give three points
2 mk
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2.
25 marks
You are provided with specimens Q, R , S and T.
(a)
(i) Classify each of the specimens R, S and T to class level. (ii) State three reasons for placing the specimen S to its respective class in 2(a)(i).
7 mk
(b)
Why is it important to understand the type of classification system used to place specimens R, S and T in their respective groups? Give one reason.
3 mk
(c)
State three advantages of the members which have been placed together with specimen R in the same Class.
5 mk
(d)
Why specimen Q is placed in the Division Bryophyta? Give two reasons.
5 mk
(e)
Draw a well labelled diagram of specimen Q.
5 mk
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