WAEC Agricultural Science Past Questions & Answers - Page 95

471.

If T represents the gene for tallness while t represents dwarfness

The genotypic ratio of the second filial generation will be

A.

3 : 1

B.

1 : 2 : 1

C.

2 : 2

D.

4 : 0

Correct answer is A

No explanation has been provided for this answer.

472.

Yellow colouration of the lower leaves of a growing maize plant may be due to deficiency in

A.

Potassium

B.

Phosphorus

C.

Zinc

D.

Nitrogen

Correct answer is B

When plant is lacking phosphorus, its leaves become yellow.

473.

The weight of a sheep increased from 25kg to 45kg in two months.

If the total consumption during the period was 60kg. Determine the feed conversion ratio

A.

1 : 1

B.

1 : 2

C.

3 : 1

D.

4 : 1

Correct answer is C

Feed Conversion Ratio (FCR)
= (Mass gained)/(Mass of feed)
= Mass Gained = 45kg – 25kg = 20kg
= Mass of feed = 60kg
= FCR = 20/60
= 1/3
= 1 : 3

474.

Close to the time of harvesting of cotton, sunshine is needed to ensure the production of bolls that are

A.

Big

B.

Bright

C.

Not mouldy

D.

Not open

Correct answer is B

Sun Lighting helps to brighten cotton bolls that are bright which depicts good quality.

 

475.

Sexual maturity in farm animals is not influenced by their

A.

Breed

B.

Sex

C.

Nutrition

D.

Wearing age

Correct answer is D

No explanation has been provided for this answer.