JAMB Biology Past Questions & Answers - Page 59

291.

Which of the following waste products in plants is excreted through the stomata and lenticles?

A.

carbon dioxide

B.

alkaloids

C.

tannins

D.

anthocyanins

Correct answer is A

The waste products of a plant are carbon dioxide, water vapour, and oxygen.

292.

Seed plants are divided into

A.

monocoty ledons and dicotyledons

B.

tracheophytes and ferns

C.

angiosperms and gymnosperms

D.

thallophytes and bryophytes

Correct answer is C

No explanation has been provided for this answer.

293.

The process by which a red blood cell placed in distilled water absorbs water until it bursts and releases its content into the surrounding is known as

A.

osmosis

B.

plasmolysis

C.

turgidity

D.

haemolysis

Correct answer is D

Your body normally destroys old or faulty red blood cells in the spleen or other parts of your body through a process called haemolysis.

294.

The activity of ptyalin is likely to decrease with an increase in the concentration of

A.

oxygen

B.

starch

C.

protein

D.

acid

Correct answer is D

No explanation has been provided for this answer.

295.

The smallest living organism which shares the characteristics of both living and non-living matter are

A.

bacteria

B.

fungi

C.

viruses

D.

protozoa

Correct answer is C

No explanation has been provided for this answer.