2010 - JAMB Biology Past Questions and Answers - page 5

41
If both parents are heterozygous for a trait, the probability that an offspring will be recessive for that trait is
A
\(\frac{1}{2}\)
B
\(\frac{3}{4}\)
C
\(\frac{1}{4}\)
D
1
correct option: c
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42
Use the diagram above to answer this question.In which plantation are all the trees between the height of 2-4m?
A
lll
B
ll
C
l
D
lV
correct option: a
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43
Use the diagram above to answer this question.Which of the following is a true feature of plantation ll?
A
it has the highest number of trees of about 2m high.
B
it has highest number of trees
C
it has the highest number of tall trees
D
the height of all its trees range between 2m and 6m
correct option: a
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44
Use the diagram above to answer this question.The movement of material in the xylem and phloem tissues of the plant are represented by the arrows labelled
A
lll and IV respectively
B
ll and l respectively
C
l and ll respectively
D
l and lll respectively
correct option: a
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45
Use the diagram above to answer this question.During photosynthesis, the arrow labelled ll represents the
A
escape of mineral salts
B
absorption of energy from the sun
C
release of carbon (IV) oxide
D
release of oxygen as a by-product
correct option: d
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46
Use the diagram above to answer this question.The main function of the feathers covering the part labelled is to
A
prevent ectoparasites from attacking the animal
B
generate heat to keep the animal warm
C
provide some power for flight
D
serve as insulator to maintain body heat
correct option: d
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47
Use the diagram above to answer this question.Based on the shape and structure of the beak and feet, the bird represented is likely to feed mainly on
A
flesh
B
fruits
C
seeds
D
nectar
correct option: a
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48
Use the diagram above to answer this question.With respect to their decreasing dependence on aquatic conditions for reproduction, which of the following is the correct arrangement of the animals represented?
A
l,IV,II and lll
B
IV, lll, ll and l
C
l, ll, IV and lll
D
lll, ll, IV and l
correct option: b
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49
In the diagram, which of the animals represents the oldest creatures in terms of evolutionary history?
A
iii
B
ii
C
i
D
iv
correct option: d
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