Waec Biology 1989 Past Questions and Answers

Question 51:

• WAEC 1989

The evidence for evolution can be obtained from the following except

A. Fossil
B. Anatomy
C. History
D. Embryology
E. Taxonomy.

Question 52:

• WAEC 1989

The similarity between the bone structure of the arm of a human and the fore-limb of a
rabbit indicates

A. Adaptive radiation
B. Continuous variation
C. A common origin
D. Convergent evolution
E. Adaptation to the same environment

Question 53:

• WAEC 1989

What phenomenon in ecosystem does the diagram illustrate?

A. Pyramid of numbers
B. Food web among organisms
C. Pyramid of energy
D. Pyramid of biomass
E. Evolutionary trend in organisms

Question 54:

• WAEC 1989

Which of the following effects would desertification have on the
ecological balance represented in the diagram above? The calorific
value' of the energy

A. . 10 x 10⁴k cal obtained from the sun would decrease
B. 10 x 10⁴k cal obtained from the sun would increase
C. 6 x 10⁴k cal obtained at level I would increase
D. 1 x 10⁴k cal obtained at level V would increase
E. 3.5x 10⁴k cal obtained at level II would increase

Question 55:

• WAEC 1989

One of the methods of preventing measles is by

A. Sleeping under mosquito net
B. Attacking the vectors
C. Attacking the secondary host
D. Vaccinating young children
E. Providing clean water supply