Biology 2010 Jamb Examination
Biology 2010 Jamb Examination
Question 31
The vector for yellow fever is?
Yellow fever is transmitted by the Aedes mosquito, primarily Aedes aegypti, which serves as the vector by spreading the virus from one host to another.
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Question 32
The loss of soil through erosion can be reduced by?
Soil erosion is minimized by crop rotation because it helps maintain soil structure, fertility, and provides ground cover, reducing the impact of erosive forces.
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Question 33
The protozoan plasmodium falciparum is transmitted by?
Plasmodium falciparum, the causative agent of malaria, is transmitted by the bite of infected female Anopheles mosquitoes.
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Question 34
A dilute solution of phenylthiocarbamide tastes bitter to some people and is tasteless to others. This is an example of?
The ability to taste phenylthiocarbamide is genetically controlled, with individuals either able or unable to taste it, showing discontinuous variation.
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Question 35
Thyroxine and adrenalin are examples of hormones which control?
Thyroxine and adrenalin are hormones that influence metabolic processes and physiological responses, thereby affecting behavioural patterns such as activity levels and stress response.
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Question 36
A pair of genes that control a trait is referred to as?
A pair of genes that determine a trait are called alleles. They may be similar (homozygous) or different (heterozygous) forms of a gene.
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Question 37
The chromosome number of a cell before and after the process of meiosis is conventionally represented as?
Meiosis reduces the chromosome number by half, from diploid (2n) to haploid (n), which is essential for sexual reproduction.
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Question 38
At what stage in the life history of a mammal is the sex of an individual set?
The sex of a mammal is determined at conception, depending on whether the sperm carries an X or Y chromosome, combining with the maternal X.
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Question 39
The main distinguishing features between the soldier termite and other members of the caste are the?
Soldier termites are wingless and are characterized by large heads and strong mandibles, which they use for defense of the colony.
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Question 40
The flippers of a whale and the fins of a fish are examples of?
Whale flippers and fish fins perform similar functions but evolved independently in different groups, illustrating convergent evolution.
