JAMB Agricultural Science Past Questions & Answers - Page 63

311.

Miracidium is one of the stages in the life cycle of

A.

Roundworm

B.

Liver fluke

C.

Tapeworm

D.

Tick

Correct answer is D

Miracidium is the free swimming larva of trematodes (liver fluke) which emerges from an egg and penetrates the body of a snail host.

312.

Which of the following is not a method of improving rangeland?

A.

Practicing continuous grazing

B.

Routine and regular weeding

C.

Routine reseeding

D.

Regular application of fertilizers

Correct answer is A

The practice of continuous grazing is not a method of controlling rangeland.

313.

Layer's ration contains more limestone than grower's ration because limestone

A.

Is difficult for the growers to digest

B.

Stimulates layer's appetite

C.

Reduces the acidity in the gut if growers

D.

Supplies sufficient minerals to layers for shell formation

Correct answer is D

Layer's ration contains more limestone than grower's ration as limestone supplies calcium which is needed for shell formation in layers.

314.

The adult male cattle is called

A.

Bull

B.

Ram

C.

Boar

D.

Duck

Correct answer is A

No explanation has been provided for this answer.

315.

The hormone responsible for milk let down in female farm animals is

A.

Testosterone

B.

FSH

C.

Oxytocin

D.

Androgen

Correct answer is C

Oxytocin is a hormone that is involved in childbirth and breast-feeding.