JAMB Biology Past Questions & Answers - Page 393

1,961.

The two types of human tapeworm can be distinguished by the presence or absence of 

A.

scolex

B.

hook

C.

head

D.

sucker

E.

proglottis

Correct answer is B

No explanation has been provided for this answer.

1,962.

What is name of the respiratory organ of the crab?

A.

Tubules

B.

Trachaea

C.

Spiracles

D.

Lungs

E.

Gills

Correct answer is D

branchiostegal lung is a respiration organ used by some air-breathing arthropods.

It is one of the most significant adaptations of some crabs and hermit crabs such as the coconut crab to their terrestrial habitats.

1,963.

The rate of transpiration of a leafy shoot would be highest under 

A.

damp, cold, still air

B.

damp, warm, moving air

C.

dry, warm, moving air

D.

dry, cold, moving air

E.

dry, warm, still air

Correct answer is C

No explanation has been provided for this answer.

1,964.

Milk protein is hydrolyzed by

A.

renin

B.

amylase

C.

lipase

D.

lactase

E.

pepsin

Correct answer is E

There are two common ways of achieving hydrolysis of milk proteins. You can either boil in a strong acid/ base for a very long time, or use an enzyme like PANCREATIC PROTEASE to simulate hydrolysis naturally. Pepsin is an example of pancreatic proteases.

1,965.

Which of the following instruments is used to demonstrate the response of roots and shoots to gravity? 

A.

Clinostat

B.

Manometer

C.

Porometer

D.

Potometer

E.

Photometer

Correct answer is A

Clinostat : A device used in experiments to test the influence of gravity on the growth movements of plants (see geotropism).