Waec Biology Past Questions and Answers

Question 1826:

• WAEC 1988

The vector of the malarial parasite is the

A. Male Anopheles
B. Female Culex
C. Male Culex
D. Female Anopheles
E. Female Aedes

Question 1827:

• WAEC 1988

A constituent of the exhaust gases of motor vehicles which causes serious air pollution is

A. Water vapour
B. Carbondioxide
C. Carbon monoxide
D. Oxygen
E. Ozone

Question 1828:

• WAEC 1988

Which of the following steps would not be taken to protect or conserve fishing grounds from over-exploitation?

A. . Use of nets with all sizes of mesh
B. Use of nets with a particular mesh size
C. Ban on harvesting of some species
D. Regulating the size of ships allowed into fishing grounds
E. Limiting the period of fishing in the waters

Question 1829:

• WAEC 1988

Which of the following .is not part of the objectives of conservation of natural resources?

A. To eliminate wild animals in order to enable other plants and animals survive
B. To use our resources on sustained yield basis
C. To guard against indiscriminate killing of plants and animals
D. To guard against the extinction and exhaustion o natural resources
E. To protect the environment

Question 1830:

• WAEC 1988

During blood transfusion, agglutination may occur as a result of the reaction between

A. Similar antigens and antibodies
B. Contrasting antigens and antibodies
C. Two different antigens
D. Two different antibodies
E. White blood cells from the two individuals.