Jamb Biology 1993 Past Questions and Answers

Question 26:

• JAMB 1993

In H, the cotyledons are carried above the soil because

A. The epicotyl grows faster than the hypocotyl
B. The hypocotyl grows faster than the epicotyl
C. Both grow at the same rate
D. The epicotyl outgrow the radicle

Question 27:

• JAMB 1993

The function of the structure labelled G is to

A. Carry out initial photosynthesis for the seedlings
B. Protect the young leaves from mechanical damage
C. Protect the young leaves from sun light
D. Protect the young leaves from insects pest

Question 28:

• JAMB 1993

When it is cold, the blood vessels of the skin

A. Dilates to increase the amount of blood flowing
B. Constrict to reduced the amount of blood flowing to the skin
C. Dilate to reduce the amount of blood flowing to the skin
D. Constrict to increase the amount of blood flowing to the skin

Question 29:

• JAMB 1993

Which path does sound entering the human ear follow?

A. Oval window → ossicles → ear drum
B. Ear drum → oval window → ossicles
C. Ear drum → ossicles → oval window
D. Ossicles → ear drum → oval window

Question 30:

• JAMB 1993

What would happen to a man whose pancreas has been surgically removed?

A. The level of blood sugar would increase
B. The glycogen content of the liver would increase
C. His blood pressure would decrease
D. His weight would increase appreciably