CSEE
Biology · Paper 2A · 2024
9 questions 🇹🇿 NECTA ✓ Official NECTA answers
CSEE
🇹🇿 NECTA
✓ Official NECTA answers
Biology · Paper 2A · 2024
9 questions
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200 TZS
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Questions (9)
Section B
1.
3 marks
Explain three importance of specimen S to human being. Give three points to support your answer.
(a)
What was the aim of the experiment?
1 mk
(a)
What was the aim of the experiment?
2 mk
(b)
Why specimen X boiled in water for about 4 minutes?
2 mk
(b)
Why specimen X boiled in water for about 4 minutes?
1 mk
(c)
Identify the observation made when specimen X boiled in methylated spirit.
1 mk
(c)
Identify the observation made when specimen X boiled in methylated spirit.
2 mk
(d)
Briefly explain one importance for each of the following:
2 mk
(d)
Briefly explain one importance for each of the following:
4 mk
(e)
Identify the texture of specimen X after:
2 mk
(d(i))
Putting specimen X in hot methylated spirit.
2 mk
(d(ii))
Placing a test tube containing specimen X and methylated spirit in a beaker of boiling water.
2 mk
(f)
Give your observation when iodine solution was added on the surface of specimen X.
2 mk
((d)(i)
Placing a test tube containing specimen X and methylated spirit in a beaker of boiling water.
1 mk
(e)
Identify the texture of specimen X after:
2 mk
(g)
What is your conclusion about the results of the experiment in procedures (i) - (iv)?
3 mk
(e(i))
removing the specimen from hot methylated spirit.
1 mk
(h)
Draw a diagram of specimen X and label four external parts.
10 mk
((e)(i)
rinsing the specimen with warm water.
1 mk
(e(ii))
rinsing the specimen with warm water.
1 mk
(f)
Give your observation when iodine solution was added on the surface of specimen X.
2 mk
(g)
What is your conclusion about the results of the experiment in procedures (i) - (iv)?
1 mk
(h)
Draw a diagram of specimen X and label four external parts.
2 mk
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2.
2 marks
Identify reproductive structure shown by specimens V and S.
(a(i))
State three distinctive characteristics for placing specimen V and S in the same kingdom.
9 mk
((a)(i)
State three characteristics that made each of the specimens V and S to belong to different divisions.
3 mk
(a(ii))
State three characteristics that made each of the specimens V and S to belong to different divisions.
15 mk
(a)
iv) Identify reproductive structure shown by specimens V and S.
2 mk
(b)
Closely observe specimen S and then identify the floral arrangements which are typical characteristics of the class it belongs.
4 mk
(c)
iii) Give three reasons for specimen T to belong to the respective division.
6 mk
(d)
Explain importance of specimen U to the environment.
4 mk
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