Question 226:

• JAMB 1981

A surprising fact about sickle cell disease is that it

A. Affects only black people
B. Kills the patient
C. Is hereditary
D. Affects blood cells
E. Weakens the patient

Question 227:

• JAMB 1981

Nitrification means

A. Conversion of nitrates to nitrogen
B. Fixing nitrogen into plants
C. Conversion of nitrates to nitrites
D. Changing of ammonia to nitrities, then nitrates
E. Nitrogen cycle

Question 228:

• JAMB 1981

Which of the following statements is NOT true of menstruation?

A. It occurs monthly
B. The discharge contains amniotic fluid
C. Its signifies no conception
D. It involves the lining of uterus
E. It may cause pains

Question 229:

• JAMB 1981

The tissue which connects a muscle to a bone is a

A. Cartiligae
B. Muscle fibre
C. Tendon
D. Ligament
E. Connecting fibre

Question 230:

• JAMB 1981

A fruit formed from a single flower having several free carpels is

A. A multiple fruit
B. A dry dehiscent fruit
C. A dry indehiscent fruit
D. A simple fruit
E. An aggregate fruit