WAEC Past Questions and Answers - Page 4071

20,351.

When gametes from pure breed parents with contrasting features such as tallness and shortness are
involved in a monohybrid cross, the offsprings in the first filial generation are usually

A.

pure breed

B.

heterozygous dominant

C.

homozygous recessive

D.

mutants

E.

co-dominant

Correct answer is B

No explanation has been provided for this answer.

20,352.

Thrombocytes are blood cells responsible for initiating

A.

phagocytosis of bacteria

B.

ribosome synthesis

C.

blood clotting

D.

immunity to certain infectious diseases

E.

removal of carbondioxide from tissues

Correct answer is C

No explanation has been provided for this answer.

20,353.

The instrument used in the measurement of atmospheric pressure is?

A.

Hydrometer

B.

Ratemeter

C.

Barometer

D.

Photometer

E.

Manometer

Correct answer is C

No explanation has been provided for this answer.

20,355.

Water rises most rapidly in

A.

sandy soil

B.

clayey soil

C.

sandy-loam soil

D.

loamy soil

E.

humus soil

Correct answer is A

No explanation has been provided for this answer.