JAMB Biology Past Questions & Answers - Page 23

111.

The components of blood in man are?

A.

red blood cells, white blood cells, plasma, and water

B.

red blood cells, white blood cells, and plasma

C.

red blood cells, white blood cells, and platelets

D.

red blood cells, white blood cells, plasma, and platelets

Correct answer is D

It has four main components: plasma, red blood cells, white blood cells, and platelets.

Blood has many different functions, including: transporting oxygen and nutrients to the lungs and tissues.

112.

The part that performs urinogenital function in the male reproductive system is the?

A.

seminal vesicle

B.

epididymis

C.

urethra

D.

ureter

Correct answer is C

Urethra — this is a tube that extends from the bladder to the external opening at the end of the penis. The urethra carries both urine and sperm.

113.

The type of fruit that is formed from a single flower having several free carpels is?

A.

indehiscent fruit

B.

aggregate fruit

C.

simple fruit

D.

fleshy fruit

Correct answer is B

An aggregate fruit is a fruit that develops from the merger of several ovaries that were separated in a single flower.

114.

The feeding relationship that exists between a tick and a cow is?

A.

parasitism

B.

mechanism

C.

saprophytism

D.

commensalism

Correct answer is A

Cows are not immune to ticks and thanks to their hairy hides, ticks love to attack herds of cattle. Feeding off their host's blood supply, ticks spend their lives on animals of all kinds, including cows. Ticks can even transmit potentially fatal diseases to cows through their bites.

The cattle tick is considered to be the most important parasite of livestock worldwide 

115.

The part of mammalian skin that excretes metabolic wastes is?

A.

sweat gland

B.

horny layer

C.

Malpighian layer

D.

sebaceous gland

Correct answer is A

Sweat glands are used to regulate temperature and remove waste by secreting water, sodium salts, and nitrogenous waste (such as urea) onto the skin surface.