WAEC Agricultural Science Past Questions & Answers - Page 202

1,006.

Assuming that in sheep, the allele for black coat colour is dominant over that for brown coat colour. Crossing a heterzygote black with a homozygote brown will produce

A.

100% brown coat coloured offspring

B.

75% brown coat coloured offspring

C.

50% brown coat coloured offspring

D.

25% brown coat coloured offspring

Correct answer is C

No explanation has been provided for this answer.

1,008.

Biological methods of weed control do not include

A.

Introducing insects to control weeds

B.

Planting crops to compete with the weeds

C.

Planting leguminous cover crops

D.

Uprooting the weeds

Correct answer is D

No explanation has been provided for this answer.

1,009.

The side effects of the various preventive and control measures of pests and diseases of crops include the following except

A.

Improved quality of farm produce

B.

Environmental pollution

C.

Poisoning of wildlife

D.

Disruption of the ecosystem

Correct answer is A

No explanation has been provided for this answer.

1,010.

The eradication of mealy bugs is an effective control of

A.

Corn smut

B.

Swollen shoot of cocoa

C.

Groundnut rosette

D.

Rice blast

Correct answer is B

No explanation has been provided for this answer.