Biology 2011 Jamb Examination
Biology 2011 Jamb Examination
Question 1
The function of the red head in male Agama lizards is to
The red head in male Agama lizards serves as a sexual display feature. It is used to attract female lizards for mating and indicates dominance over other males. This coloration does not function as camouflage or warning coloration but as a reproductive adaptation.
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Question 2
Seed plants are divided into
Seed plants are classified into angiosperms (flowering plants) and gymnosperms (non-flowering plants). Monocotyledons and dicotyledons are subdivisions of angiosperms, while tracheophytes include all vascular plants.
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Question 3
In which of the following groups of vertebrates is parental care mostly exhibited?
Parental care is highly developed in mammals where the young are nourished by milk and often protected for a long time. Although birds (Aves) also show parental care, mammals demonstrate the highest level of it.
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Question 4
The adaptive importance of nuptial flight from termite colonies is to
Nuptial flight in termites enables the winged reproductives (alates) to disperse and establish new colonies. This ensures the survival and spread of the species.
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Question 5
An example of an endospermous seed is
An endospermous seed retains its endosperm as food storage for the embryo. Maize grain is a classic example of an endospermous seed. Cashew, cotton, and beans are non-endospermous seeds.
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Question 6
Which of the following can cause shrinkage of living cells?
A hypertonic solution has a higher solute concentration than the cell sap. Water moves out of the cell by osmosis, causing shrinkage (plasmolysis).
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Question 7
Which of the following is true of leucocytes?
Leucocytes (white blood cells) are large, nucleated cells involved in defense mechanisms of the body. They are not respiratory pigments, not the most numerous (erythrocytes are), and not responsible for clotting (platelets are).
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Question 8
The conversion of a nutrient into a molecule in the body of a consumer is referred to as
Assimilation is the process by which absorbed food materials are converted into complex molecules that become part of the body cells and tissues.
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Question 9
The ability of living organism to detect and respond to changes in the environment is referred to as
Irritability is the ability of living organisms to perceive stimuli and respond to changes in their environment. Locomotion is movement, growth is increase in size, and taxis is directional response.
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Question 10
In mammals, the exchange of nutrients and metabolic products occurs in the
In mammals, exchange of nutrients and metabolic products occurs in the lymphatic system. Lymph transports fats and also facilitates exchange between tissues and blood.
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