JAMB Biology Past Questions & Answers - Page 69

341.

The glomerular filtrate contains the following except

A.

Water

B.

Urea

C.

Blood Corpuscles

D.

Glucose

Correct answer is C

The glomerulus helps in the mechanism of excretion (formation of urine) in mammals. It does not contain the blood corpuscles.

342.

Which of the following statements 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

Correct answer is D

The autonomic nervous system is concerned with the control of the body's involuntary activities e.g breathing, heartbeat, digestion, etc.

343.

Which of the following controls all voluntary actions?

A.

Olfactory lobes

B.

Cerebrum

C.

Hypothalamus

D.

Pons varolii

Correct answer is B

The Cerebrum is the largest part of the brain and it controls all voluntary actions like speech, dancing, etc., It is also concerned with the concentration and coordination of impulses.

344.

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

Correct answer is C

Commensalism is the association between 2 organisms living together where only one benefits from the association while the other is neither benefited nor harmed e.g Ramora fish and shark. Commensalism is an example of a symbiotic association.

345.

Viruses are pathogens of the following diseases except

A.

Tuberculosis

B.

Measles

C.

Small pox

D.

Poliomyelitis

Correct answer is A

Tuberculosis is classified under diseases causes by bacteria, not viruses.