Biology 2014 Jamb Examination
Biology 2014 Jamb Examination
Question 1
The lowest level of organization in living organisms is
The cell is considered the fundamental and lowest level of organization in living organisms, as it is the basic structural and functional unit capable of performing all life processes.
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Question 2
In the diagram, the organs for attachments to the lining of the host's intestine are labelled
The labeled organs ii and iii represent the suckers and hooks, which are specialized structures that allow parasitic worms to attach firmly to the host's intestinal lining and resist peristalsis.
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Question 3
In the diagram, the part labelled I is the
Root hairs, labeled as I, are extensions of epidermal cells in roots that greatly increase the surface area for water and mineral absorption from the soil, which is essential for plant nutrition.
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Question 4
The diagram is the transverse section of a
The transverse section shows a dicotyledonous root because it displays a central xylem in a star-like pattern surrounded by phloem, characteristic of dicot roots, and allows differentiation from stems and monocots.
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Question 5
Use the diagram above to answer this question. The part responsible for photosynthesis is labelled
The part labeled III is the chloroplast-containing tissue where photosynthesis occurs. Chloroplasts absorb light energy and convert it into chemical energy, producing glucose and oxygen for plant metabolism.
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Question 6
Use the diagram above to answer this question. The young proglottid is represented by
The young proglottid is labeled IV, representing an immature segment of the tapeworm that is developing reproductive organs. It is closer to the neck region where new segments are produced.
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Question 7
All living organisms are constantly involved in a struggle for existence. This was proposed by
Darwin proposed that organisms compete for limited resources, and this struggle for existence leads to natural selection, where only those best adapted to their environment survive and reproduce.
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Question 8
Adaptive radiation is illustrated in
Adaptive radiation occurs when a single ancestral species evolves into multiple forms to exploit different ecological niches. Modified insect mouthparts show such diversification to utilize various food sources.
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Question 9
i. Growth is mainly apical ii. Growth is specific with definite shape iii. Growth is throughout life. Which of the above correctly describes the growth pattern in plants?
Plants exhibit apical growth and growth with a definite shape, meaning growth occurs primarily at tips of roots and shoots, and the overall form remains fixed; growth throughout life is not always uniform.
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Question 10
A biological agent with antiviral property is
Interferons are proteins produced by host cells in response to viral infections. They inhibit viral replication and boost the immune response, making them important antiviral agents.
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