Waec Biology 2002 Past Questions and Answers

Question 36:

• WAEC 2002

Which of the following measures is most likely to cause a damage to the ecosystem in the control of pests
and weeds?

A. Use of ladybird insects to feed on aphids
B. Introduction of bacterium to kill larvae of butterfly
C. Introduction of Tilapia fish in ponds to feed on mosquito larvae
D. Spraying insecticides to destroy cotton- stainers in a cotton-field

Question 37:

• WAEC 2002

The total amount of energy entering a food chain is that which is present in the

A. Consumer
B. Ecosystem
C. Producer
D. Decomposer

Question 38:

• WAEC 2002

Which of the following terms ensures the survival of an organism in its environment?

A. Hibernation
B. Succession
C. Adaptation
D. Competition

Question 39:

• WAEC 2002

The concave shape of a birds wing during flight, ensures that the greater air pressure under the wings will

A. Counteract the effect of gravity
B. Lift the bird so that it can remain airborne
C. Enable the pectoral ,muscles to contract easily
D. Change the direction of the flying bird

Question 40:

• WAEC 2002

The possession of breathing roots is a characteristic of plants growing in

A. Mangrove swamp
B. Coastal savanna
C. Guinea savanna
D. Shrub biome