Jamb Biology 1981 Past Questions and Answers

Question 16:

• JAMB 1981

What is name of the respiratory organ of the crab?

A. Tubules
B. Trachaea
C. Spiracles
D. Lungs
E. Gills

Question 17:

• JAMB 1981

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

Question 18:

• JAMB 1981

All the following are digestive enzymes except

A. Bile
B. Lipase
C. Maltase
D. Pepsin
E. Ptyalin

Question 19:

• JAMB 1981

In a bakery, yeast is added to flour to make bread rise. This is possible because yeast produces

A. Alcohol
B. Oxygen
C. Carbon dioxide
D. Energy
E. Ethanol

Question 20:

• JAMB 1981

Accommodation of the human eye is best described as the

A. Ability to see distant objects
B. Movement of upper and lower eyelids
C. Focusing of near and distant objects
D. Changing of lens shape due to varying light intensities
E. Constant adjustment of the iris