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CSEE 🇹🇿 NECTA ✓ Official NECTA answers

Biology · Paper 2A · 2022

2 questions

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Questions (2)

Section A

1. 25 marks

You have been provided with the following containing slidine U and T. Study carefully the specimen T provided with it slide facing upward and then answer the following questions: (a) What is the type of reproduction exhibited by specimen T and U? (b) What are the advantages and disadvantages of the types of reproduction exhibited by specimen T. (c) Draw the diagrams of specimens T and U and label their internal and external parts. (d) Which process would not proceed normally if the internal part of specimens U and T are totally removed from the live plants? (e) State two economic importances of the specimen T in our daily life.

(a) What is the type of reproduction exhibited by specimen T and U? 1 mk
(b) What are the advantages and disadvantages of the types of reproduction exhibited by specimen T. 1 mk
(c) Draw the diagrams of specimens T and U and label their internal and external parts. 1 mk
(d) Which process would not proceed normally if the internal part of specimens U and T are totally removed from the live plants? 1 mk
(e) State two economic importances of the specimen T in our daily life. 1 mk

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2. 25 marks

You have been provided with specimens L, M, N and P. Using a hand lens, carefully study the specimens and then answer the following questions: (a) Why is it not recommended to place the specimens L, M and N in the same Kingdom. Give reasons. (b) i) Classify specimens L, M and N to Class level. ii) State two reasons for placing the specimens M and N in their respective Classes in (b)i). iii) In what ways do the members of the Class in which specimen L belongs advantageous to other living organisms? (c) Carefully observe the specimen P and then answer the following questions: i) In which Phylum does the specimen P was taken? Give reason to support your answer. ii) Name four organisms which can be placed in the same Phylum/Division of specimen P. iii) What are the advantages of specimen P in daily life? Give three points.

(a) Why is it not recommended to place the specimens L, M and N in the same Kingdom. Give reasons. 1 mk
((b) i) In what ways do the members of the Class in which specimen L belongs advantageous to other living organisms? 1 mk
((c) i) What are the advantages of specimen P in daily life? Give three points. 1 mk

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