JAMB Biology Past Questions & Answers - Page 359

1,791.

Haemophilia results from the mutation of the genes

A.

in the sex chromosome

B.

which control skin colour

C.

which control the mechanism for blood-clotting

D.

which control the formation of haemoglobin

Correct answer is C

No explanation has been provided for this answer.

1,792.

In a positive phototropic response of a coleoptile, the region of greatest curvature is brought about by the

A.

movement of auxins away from the region of curvature

B.

even distribution of auxins in all parts of the coleoptile

C.

inhibition of growth by auxins in the region f smaller curvature

D.

concentration of auxins in the region of curvature

E.

absence of auxins in the coleoptile

Correct answer is D

No explanation has been provided for this answer.

1,793.

Which of the following represents the evolutionary sequence in these plants?

1. Flowering plants
2. Ferns
3. Mosses
4. Algae
5. Conifers

A.

2 → 1 → 4 → 3 → 5

B.

5 → 4 → 3 → 2 → 1

C.

2 → 4 → 5 → 1 →3

D.

3 → 2 → 4 → 5 → 1

E.

4 → 3 → 2 → 5 → 1

Correct answer is E

No explanation has been provided for this answer.

1,794.

which of the following diseases could be exclusively associated with river basin? 

A.

Malaria

B.

Syphilis

C.

Onchocerciasis

D.

Cholera

E.

Poliomyelitis

Correct answer is C

No explanation has been provided for this answer.

1,795.

Starting from the skull end the vertebrate are arranged in the following order

A.

axis, atlas, cervical, thoracic and lumber

B.

atlas, cervical, axis, thoracic and lumber

C.

atlas, axis, thoracic, cervical and lumber

D.

atlas, axis, cervical, thoracic and lumber

E.

atlas, thoracic, cervical, axis and lumber

Correct answer is D

No explanation has been provided for this answer.