Jamb Biology 1981 Past Questions and Answers

Question 21:

• JAMB 1981

Normally any character shown by an organism is due to the effects of

A. Hormones and chromosomes
B. Chromosomes
C. Mutation
D. Hormones and genes
E. Genes and enviroment

Question 22:

• JAMB 1981

Which of the following statement is NOT true of symbiosis?

A. Symbionts must be living
B. It is an association of 'give and take'
C. The association may involve two plants
D. Association between two similar species
E. Symbionts derive mutual benefit

Question 23:

• JAMB 1981

A person whose blood can be donated to all other people, must have the blood group

A. O
B. AB
C. B
D. A
E. None of the above

Question 24:

• JAMB 1981

If Benedict's solution gives a positive result in a food test, the food contains

A. Sugar
B. Protein
C. Oil
D. Fat
E. Cellulose

Question 25:

• 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