Waec Biology 2009 Past Questions and Answers

Question 41:

• WAEC 2009

Most tropical plants shed their leaves during dry weather conditions in order to

A. Reduce their growth rate.
B. Conserve water
C. Reduce competition
D. Minimize the rate of photosynthesis

Question 42:

• WAEC 2009

Which of the following features is not an adaptation of plants to aquatic habitat?

A. Breathing roots for entry of air
B. Flowers raised above water for the purpose of pollination
C. Spongy tissues containing gases for buoyancy
D. Hairy structures on the leaves to reduce water loss

Question 43:

• WAEC 2009

The following habitats can be used in the study of succession except

A. Savanna grassland
B. Abandoned farmland.
C. A pond
D. A well cultivated land

Question 44:

• WAEC 2009

Population growth rate may be defined as the

A. Ortality rate per unit area over a period
B. Number of times an organism occurs within a given period
C. Number of a particular species per unit area
D. Net rate of natality and mortality in the habitat over a period.

Question 45:

• WAEC 2009

In ecological succession, since Iichens grow on bare rock, they are considered to be

A. Primary consumers
B. Pioneer organisms
C. Climax organisms
D. Producers