JAMB Biology Past Questions & Answers - Page 57

281.

The hereditary characters in plants and animals are located on the

A.

gene

B.

mucleus

C.

chromosome

D.

cell

Correct answer is C

No explanation has been provided for this answer.

282.

The crossing of individuals of the same species with different genetic characters is

A.

croos breeding

B.

polygenic inheritance

C.

non-disjunction

D.

inbreeding

Correct answer is A

No explanation has been provided for this answer.

283.

The rate of transpiration is NOT affected by

A.

the weight of the stomata pores

B.

humidity

C.

temperature

D.

the size of the stomata pores

Correct answer is A

No explanation has been provided for this answer.

284.

In which of the following vertebrates does the skin function as a respiratory surface?

A.

rat

B.

lizard

C.

fish

D.

frog

Correct answer is D

Amphibians utilize gills for breathing early in life, and develop primitive lungs in their adult life; additionally, they are able to breathe through their skin.

285.

Which of the following organs regulates the levels of water. salts, hydrogen ions, and urea in the mammals?

A.

Kidney

B.

Colon

C.

Bladder

D.

Liver

Correct answer is A

No explanation has been provided for this answer.