Question 336:

• JAMB 1983

‘Jointed skeleton’ is absent in the

A. Cockroach
B. Spider
C. Millipede
D. Snail
E. Dragon fly

Question 337:

• JAMB 1983

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

Question 338:

• JAMB 1983

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

Question 339:

• JAMB 1983

Urea is produced in the

A. Liver
B. Bladder
C. Spleen
D. Kidneys
E. Gall bladder

Question 340:

• JAMB 1983

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