Biology 2012 Jamb Examination
Biology 2012 Jamb Examination
Question 41
An arthropod that is destructive at early stage of its life cycle is
Butterfly larvae, commonly known as caterpillars, are highly destructive to crops and plants during their early stage of life. They consume large amounts of foliage, causing significant agricultural damage.
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Question 42
An animal body that can be cut along its axis in any plane to give two identical parts is said to be
Radially symmetrical animals, like starfish and jellyfish, can be divided along multiple planes through their central axis to produce identical halves, unlike bilaterally symmetrical animals, which have only one plane of symmetry.
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Question 43
Which of the following possesses mammary gland?
Whales are mammals and thus possess mammary glands that produce milk to feed their young. Fish such as dogfish, shark, and catfish do not have mammary glands because they are not mammals.
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Question 44
The feature that links birds to reptiles in evolution is the possession of
Birds share evolutionary traits with reptiles, including the presence of scales on their legs. This indicates a common ancestry and shows how birds evolved from reptilian ancestors.
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Question 45
Countershading is an adaptive feature that enables animals to
Countershading involves animals being darker on the top and lighter on the underside, making them less visible to predators from above or below. It is a form of camouflage to remain undetected.
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Question 46
Which of the following is the lowest category of classification?
Species is the basic and lowest unit of biological classification. It defines a group of organisms that can interbreed and produce fertile offspring, unlike genus, family, or class, which are higher categories.
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Question 47
Plants that show secondary growth are usually found among the
Dicotyledons, unlike monocots, pteridophytes, and thallophytes, exhibit secondary growth due to the activity of vascular cambium and cork cambium, which increase the thickness of stems and roots.
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Question 48
The fungi are distinct group of eukaryote mainly because they have
Fungi are eukaryotic organisms distinct from plants primarily because they lack chlorophyll and cannot perform photosynthesis. They obtain nutrients heterotrophically, often by absorption from their environment.
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Question 49
In the diagram, the function of the part labelled is to
The part labelled in the diagram refers to the ovary or structure producing egg cells in the reproductive system. This is essential for sexual reproduction as it generates female gametes.
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