JAMB Biology Past Questions & Answers - Page 300

1,496.

The mammalian endocrine system is responsible for?

A.

 transmitting impulse

B.

regulating body temperature

C.

regulating osmotic pressure of blood

D.

chemical co-ordination

E.

the manufacture of blood

Correct answer is D

Endocrine glands release hormones into the bloodstream. This lets the hormones travel to cells in other parts of the body.

The endocrine hormones help control mood, growth and development, the way our organs work, metabolism , and reproduction.

1,497.

In spite of the removal of carbondioxide from the atmosphere, its amount remains more or less constant because

A.

it is produced by green plants during photosynthesis

B.

it is produced during respiration of animals

C.

it is absorbed inn ocean water

D.

green plants release it during the day

Correct answer is B

No explanation has been provided for this answer.

1,498.

In a food chain involving a primary producer, a primary consumer as well as a secondary consumer, the sharing of trophic energy is in the form that the

A.

primary consumer has more energy than the primary poducer

B.

secondary consumer takes up all the energy contents of the primary consumer

C.

energy is shared equally between the three groups of organism

D.

secondary consumer gets only a small portion of the energy contained in the primary producer

Correct answer is D

No explanation has been provided for this answer.

1,499.

The depth of illumination in a water body can be measured with a

A.

photometer

B.

secchi disc

C.

hydrometer

D.

anemometer

Correct answer is B

No explanation has been provided for this answer.

1,500.

Germination which results in the cotyledons being brought above ground is called

A.

 hypocotyl

B.

epicotyl

C.

epigeal

D.

hypogeal

E.

plumule

Correct answer is C

No explanation has been provided for this answer.