Waec Biology 2007 Past Questions and Answers

Question 41:

• WAEC 2007

The amount of energy passed from one trophic level to the next decreases because

A. Many organisms are present at the first trophic level
B. Many organisms occur at the higher trophic level
C. More energy is conserved at lower trophic levels
D. Parts of the organisms remain unutilised at each trophic level

Question 42:

• WAEC 2007

Which of these values in kj/m2 likely represents the energy content of the producers in a habitat?

A. 5033
B. 100
C. 12
D. 10

Question 43:

• WAEC 2007

The major pollutant around airport residential areas is

A. Oil spillage
B. Soot
C. Noise
D. Dust

Question 44:

• WAEC 2007

The effect of chlorofluorocarbon is

A. Reduction of oxygen concentration in the atmosphere
B. Depletion of the ozone layer
C. Screening of ultra violet rays
D. Increase in carbon dioxide concentration

Question 45:

• WAEC 2007

The order of primary succession by plants in a very dry habitat is

A. Xerophytes → mesophytes shrub
B. Mesophytes → xerophytes → shrub
C. Mesophytes → shrub -> xerophytes
D. Xerophytes → shrub → mesophytes