WAEC Biology Past Questions & Answers - Page 110

546.

Which of the following takes place when a person’s body temperature rises above 37oC

A.

Sweating and vasoconstriction

B.

Panting and vasoconstriction

C.

Sweating and vasodilation

D.

Panting and vasodilation

Correct answer is C

No explanation has been provided for this answer.

547.

A faster colour change of a dry cobalt chloride paper affixed to the lower surface of a leaf than the upper one, indicates that

A.

sunlight slows down water loss from the upper surface

B.

the lower surface of the leaf has more stomata

C.

Sunlight causes the stomata on the upper surface to close

D.

stomata are not present on the upper surface of a leaf

Correct answer is B

No explanation has been provided for this answer.

548.

In plants, respiration occurs in

A.

mesophyll cells only

B.

the root only

C.

the stomata and lenticel only

D.

all living cells

Correct answer is C

No explanation has been provided for this answer.

549.

Which of the following organisms causes syphilis?

A.

Mycobacterium tuberculosis

B.

Bordetella pertusis

C.

Treponema pallidlum

D.

Clostridium tetani

Correct answer is C

No explanation has been provided for this answer.

550.

Only specially adapted micro-organisms are found in

A.

salty water

B.

humid air

C.

moist soil

D.

mouth cavities

Correct answer is A

No explanation has been provided for this answer.