Biology 2013 Jamb Examination
Biology 2013 Jamb Examination
Question 1
The process in which complex substances are broken down into simpler ones is referred to as
Catabolism is the metabolic process in which large complex molecules are broken down into smaller simpler ones, releasing energy for the organism to use in various life processes.
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Question 2
The part of the mammalian skin involved in excretion is the
Sweat glands are specialized structures in mammalian skin responsible for excretion. They help remove waste products like urea and salts from the blood while also regulating body temperature.
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Question 3
The organism is found in soils rich in
The organism shown thrives in soils rich in humus, which provides abundant organic matter, nutrients, and a moist environment necessary for its growth and survival in the soil ecosystem.
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Question 4
In the diagram, the structure labelled II is the
The clitellum is a thickened, glandular segment found in earthworms and other annelids. It secretes mucus during reproduction and forms the cocoon for fertilized eggs, aiding in reproduction.
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Question 5
The special pigment for colour change in chameleon is
Chromatophores are specialized pigment-containing cells in chameleons that allow them to change colour for camouflage, communication, and temperature regulation, providing a key adaptive feature.
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Question 6
The behavioural adaptation in social insects could best be described as
Social insects like ants and bees demonstrate symbiotic behavioral adaptations, living in colonies where members cooperate, share resources, and protect each other, ensuring survival and reproduction of the group.
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Question 7
To which blood group do universal recipients belong?
Individuals with blood group AB are universal recipients because they have both A and B antigens on their red blood cells and no anti-A or anti-B antibodies, allowing them to receive blood from any group.
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Question 8
The clumping together of red blood cells is
Agglutination occurs when antibodies in the plasma react with antigens on red blood cells, causing them to clump together. This reaction is a critical factor in determining blood transfusion compatibility.
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Question 9
Physiological adaptation to very dry conditions in animals demonstrates
Aestivation is a form of dormancy in animals during hot or dry periods. It reduces metabolic activity, conserving water and energy, allowing survival through prolonged adverse environmental conditions.
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Question 10
One of adaptation of Cactus opuntia to conserve water is the reduction of
Cactus opuntia reduces leaves to spines to minimize water loss through transpiration. This structural adaptation is crucial for survival in arid environments with limited water availability.
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