An erect tropical perennial grass which grows to 3 - 6 metres tall and has broad hairy leaves is the

A. elephant grass

B. gaint star grass

C. spear grass

D. gamba grass

Deforestation will eventually lead to

A. improvement in soil fertility

B. improvement of soil texture

C. loss of soil organic matter

D. increase in soil pH

Golden brown lesions on peeled yam tuber indicate infection by

A. bacteria

B. virus

C. fungi

D. namatode

The eradication of mealy bugs is an effective control of

A. corn smut

B. swollen shoot of cocoa

C. groundnut rosette

D. rice blast

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

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

Assuming that in sheep, the allele for black coat colour is dominant over that for brown coat colour. What percentage of the F generation will have black colour when two heterozygotes are crossed?

A. 100%

B. 75%

C. 50%

D. 25%

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

Which of the following structures is not connected to the urethra of a bull?

A. bladder

B. epididymis

C. testis

D. rectum

Ruminants do not normally show deficiency symptoms of vitamin B complex because

A. the grasses they consume are very rich in the vitamins

B. they do not need the vitamins

C. they tolerate the deficiency of these vitamins

D. the bacteria in their rumen synthesize the vitamins