Biology 2011 Jamb Examination
Biology 2011 Jamb Examination
Question 41
In which of the following biomes is the south western part of Nigeria located?
Southwestern Nigeria falls within the tropical rainforest biome characterized by high rainfall, dense vegetation, and diverse species.
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Question 42
The inheritable characters that are determined by a gene located on the X-chromosome is
Genes located on the X-chromosome are called sex-linked genes. These traits can be dominant or recessive but are inherited based on the sex chromosomes.
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Question 43
Lack of space in a population could lead to an increase in
Overcrowding or lack of space increases contact among individuals, facilitating the spread of diseases, hence disease rate increases.
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Question 44
If the cross of a red-flowered plant with a white-flowered plant produces a pink-flowered plant, it is an example of
When the heterozygote shows an intermediate phenotype (pink) between the two homozygotes (red and white), it is a case of incomplete dominance.
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Question 45
Which of the following theories was NOT considered by Darwin in his evolutionary theory?
Darwin's theory included variation, survival of the fittest, and competition. The principle of use and disuse was proposed by Lamarck, not Darwin.
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Question 46
The crossing of individuals of the same species with different genetic characters is
Crossbreeding involves mating individuals of the same species with different traits to combine desirable genetic characteristics.
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Question 47
The number of alleles controlling blood groups in humans
Human blood groups (ABO system) are controlled by three alleles: I^A, I^B, and i.
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Question 48
During blood transfusion, agglutination may occur as a result of the reaction between
Agglutination occurs when antigens on donor red blood cells react with antibodies in the recipient's plasma (contrasting antigens and antibodies), causing clumping.
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