2019 - JAMB Biology Past Questions and Answers - page 7

61

The association between two organisms living together in which only one benefits from the association while the other is neither benefited nor harmed is

A

Predation

B

Competition

C

Commensalism

D

Dispersal

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62

Which of the following will have the least effect on the rate of change of the numbers in a population

A

Mutation

B

Food Supply

C

Disease

D

Predation

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63

Which of the following controls all voluntary actions

A

Olfactory lobes

B

Cerebrum

C

Hypothalamus

D

Pons varolii

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64

Which of the following statement describes an autonomic nervous system

A

It always stimulates effectors

B

Activities are voluntary

C

It dials with external stimuli and their responses

D

It affects glands, cardia muscles and smooth muscles

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65

The glomerular filtrate contains the following except

A

Water

B

Urea

C

Blood Corpuscles

D

Glucose

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66

One of the following is not the theory of natural selection stated by Charles Dawin

A

Characteristics acquired through use or disuse are transmitted offspring

B

Variations appear by themselves in a population

C

Heredity variations are transmitted to offspring

D

Species that are the fittest for the environment contribute more offsprings to the next needs of the generation

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67

Ecology is best defined as the study of

A

The characteristics of an environment

B

The inter-relationship between living organisms and the environment

C

Living organisms in a particular area

D

The habitats and wild life

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68

The following processes are involved during expiration in man except

A

The inter costal muscles relax

B

The thoracic activity first increases in volume

C

The sternum moves inward

D

The ribs are moved downwards and inwards

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69

Which of the following is an example of continous variation?

A

Human blood groups

B

Sex difference in human

C

Haemoglobin types

D

Height in humans

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70

One of the following is an effect of clay soil on vegetation

A

Supports luxuriant vegetation such as forest

B

Supports scanty vegetation

C

Does not support light vegetation

D

Support arid vegetation

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