JAMB Biology Past Questions & Answers - Page 350

1,746.

What is the genetic ratio of the F2 generation if members of F generation are allowed to self-pollinate?

A.

1 tall : 3 short

B.

3 tall : 1 short

C.

1 tall : 1 short

D.

4 short : 0 tall

E.

4 tall : 0 short

Correct answer is B

No explanation has been provided for this answer.

1,747.

Urea is produced in the 

A.

Liver

B.

Bladder

C.

Spleen

D.

Kidneys

E.

Gall bladder

Correct answer is A

No explanation has been provided for this answer.

1,748.

In the living cells, insufficient oxygen may cause a breakdown of glucose into?

A.

fatty acids

B.

lactic acids

C.

glycogen

D.

carbon dioxide

Correct answer is B

No explanation has been provided for this answer.

1,749.

When spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it

A.

Remains unchanged

B.

Takes up water an burst

C.

Absorbs a little water

D.

Loses water and shrivels

E.

Becomes turgid

Correct answer is D

No explanation has been provided for this answer.

1,750.

Which of the following statements about the dentition of man is INCORRECT ? man has

A.

More molars than incisors

B.

No diastema

C.

The same number of teeth on upper and lower jaw

D.

A total of thirty-two teeth

E.

A total of six molars

Correct answer is B

- Diastema refers to a gap or space between the teeth. These spaces can form anywhere in the mouth, but are sometimes noticeable between the two upper front teeth. This condition affects both adults and children. In children, gaps may disappear once their permanent teeth grow in.