Waec Biology 1991 Past Questions and Answers

Question 46:

• WAEC 1991

I.Plasmodium II. Vibro Choleroe III. Gonococcus sp IV. Poliomyelitis virus V. Syphilis bacteria
which of the following organism are transmitted by houseflies?

A. I and II only
B. II and V only
C. III and IV only
D. II and IV only
E. III and V only

Question 47:

• WAEC 1991

The practice of warming soup regularly as it concerns food preservation is essentially to

A. Retain the taste
B. Help to break down cellulose
C. Remove excess water
D. Kill the bacteria in it
E. Raise the temperature

Question 48:

• WAEC 1991

Agglutination occurs in blood transfusion when the

A. Donor and the recipient belong to the same blood group
B. Same antibodies from donor and recipient fuse together
C. Donor and the recipient belong to different race
D. Recipient is not a universal recipient
E. Antigens and anitbody in the donor and the recipient react

Question 49:

• WAEC 1991

Which of the following is not a way of conserving natural resources?

A. Controlling farming practice
B. Establishing forest reserve
C. Establishing of parks and gardens
D. Encouraging poaching in game reserve
E. Protecting endangered species

Question 50:

• WAEC 1991

Which of the following limiting resources is competed for by organism in the desert?

A. Light
B. Temperature
C. Oxygen
D. Water
E. Carbondioxide