Biology, 2010, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2010

Title :

Biology

Exam :

JAMB Exam

Paper 1 | Objectives

31 - 40 of 49 Questions

#	Question	Ans
31.	The vector for yellow fever is? A. Aedes mosquito B. Anopheles mosquito C. tsetse fly D. blackfly Show Content Detailed Solution There is an explanation video available below.	A
32.	The loss of soil through erosion can be reduced by? A. watering B. crop rotation C. manuring D. irrigation Show Content Detailed Solution Advantages of Crop Rotation There is an explanation video available below.	B
33.	The protozoan plasmodium falciparum is transmitted by? A. female Anopheles mosquitoes B. female Aedes mosquitoes C. female Culex mosquitoes D. Female blackfly Show Content Detailed Solution There is an explanation video available below.	A
34.	A dilute solution of phenylthiocarbamide tastes bitter to some people and is tasteless to others. This is an example of? A. taste bud variation B. discontinuous variation C. morphological variation D. continuous variation Show Content Detailed Solution There is an explanation video available below.	B
35.	Thyroxine and adrenalin are examples of hormones which control? A. blood grouping B. tongue rolling C. behavioural patterns D. colour variation Show Content Detailed Solution There is an explanation video available below.	C
36.	A pair of genes that control a trait is referred to as? A. an allele B. recessive C. dominant D. a hybrid Show Content Detailed Solution Alleles contribute to the organism's phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive. When an organism is heterozygous at a specific locus and carries one dominant and one recessive allele, the organism will express the dominant phenotype There is an explanation video available below.	A
37.	The chromosome number of a cell before and after the process of meiosis is conventionally represented as? A. 2n → 2n B. n → n C. n → 2n D. 2n → n Show Content Detailed Solution What are the major similarities and differences between mitosis and meiosis? Mitosis produces two cells from one parent using one division event. But meiosis produces four new child cells with two divisions, each of which has half the genetic material of its parent. Mitosis takes place all over the body, while meiosis only takes place in the sex organs and produces sex cells There is an explanation video available below.	D
38.	At what stage in the life history of a mammal is the sex of an individual set? A. at adolescence B. at puberty C. at birth D. at conception Show Content Detailed Solution The sex of a baby is determined by its chromosome make-up at conception. There is an explanation video available below.	D
39.	The main distinguishing features between the soldier termite and other members of the caste are the? A. presence of wings, possession of a small head and large thorax B. presence of wings, possession of a large thorax and a small head C. absence of wings, possession of strong mandibles and a large head D. absence of wings,possession of big head and the absence of mandible Show Content Detailed Solution Soldier termites have distinctively shaped heads and are typically bigger than workers. Their protruding mandibles help them protect their colonies. Soldiers have elongated bodies and are pale red, light brown, or white. There is an explanation video available below.	C
40.	The flippers of a whale and the fins of a fish are examples of? A. divergent evolution B. coevolution C. continous variation D. convergent evolution Show Content Detailed Solution In evolutionary biology, convergent evolution is defined as the process whereby distantly related organisms independently evolve similar traits to adapt to similar necessities. There is an explanation video available below.	D

31.	The vector for yellow fever is? A. Aedes mosquito B. Anopheles mosquito C. tsetse fly D. blackfly Show Content Detailed Solution There is an explanation video available below.	A
32.	The loss of soil through erosion can be reduced by? A. watering B. crop rotation C. manuring D. irrigation Show Content Detailed Solution Advantages of Crop Rotation There is an explanation video available below.	B
33.	The protozoan plasmodium falciparum is transmitted by? A. female Anopheles mosquitoes B. female Aedes mosquitoes C. female Culex mosquitoes D. Female blackfly Show Content Detailed Solution There is an explanation video available below.	A
34.	A dilute solution of phenylthiocarbamide tastes bitter to some people and is tasteless to others. This is an example of? A. taste bud variation B. discontinuous variation C. morphological variation D. continuous variation Show Content Detailed Solution There is an explanation video available below.	B
35.	Thyroxine and adrenalin are examples of hormones which control? A. blood grouping B. tongue rolling C. behavioural patterns D. colour variation Show Content Detailed Solution There is an explanation video available below.	C

36.	A pair of genes that control a trait is referred to as? A. an allele B. recessive C. dominant D. a hybrid Show Content Detailed Solution Alleles contribute to the organism's phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive. When an organism is heterozygous at a specific locus and carries one dominant and one recessive allele, the organism will express the dominant phenotype There is an explanation video available below.	A
37.	The chromosome number of a cell before and after the process of meiosis is conventionally represented as? A. 2n → 2n B. n → n C. n → 2n D. 2n → n Show Content Detailed Solution What are the major similarities and differences between mitosis and meiosis? Mitosis produces two cells from one parent using one division event. But meiosis produces four new child cells with two divisions, each of which has half the genetic material of its parent. Mitosis takes place all over the body, while meiosis only takes place in the sex organs and produces sex cells There is an explanation video available below.	D
38.	At what stage in the life history of a mammal is the sex of an individual set? A. at adolescence B. at puberty C. at birth D. at conception Show Content Detailed Solution The sex of a baby is determined by its chromosome make-up at conception. There is an explanation video available below.	D
39.	The main distinguishing features between the soldier termite and other members of the caste are the? A. presence of wings, possession of a small head and large thorax B. presence of wings, possession of a large thorax and a small head C. absence of wings, possession of strong mandibles and a large head D. absence of wings,possession of big head and the absence of mandible Show Content Detailed Solution Soldier termites have distinctively shaped heads and are typically bigger than workers. Their protruding mandibles help them protect their colonies. Soldiers have elongated bodies and are pale red, light brown, or white. There is an explanation video available below.	C
40.	The flippers of a whale and the fins of a fish are examples of? A. divergent evolution B. coevolution C. continous variation D. convergent evolution Show Content Detailed Solution In evolutionary biology, convergent evolution is defined as the process whereby distantly related organisms independently evolve similar traits to adapt to similar necessities. There is an explanation video available below.	D