Waec Biology Past Questions and Answers

Question 481:

• WAEC 1997

Which of the following organisms will have the highest biomass?

A. Small fish
B. Tadpole
C. Hawk
D. Phytoplankton
E. Big fish

Question 482:

• WAEC 1997

Which of the following is the correct sequence for energy transfer and nutrient cycling among living things
in an ecosystem?

A. Consumers → producers → decomposers
B. Producers → decomposers → consumers
C. Decomposers → producers → consumers
D. Producers → consumers → decomposers
E. Consumers → decomposers → producers

Question 483:

• WAEC 1997

Which of the following factors does not affect the distribution of organisms in an aquatic habitat?

A. Turbidity
B. Depth of water
C. Humidity
D. Temperature
E. Availability of nutrient

Question 484:

• WAEC 1997

A habitat with low rainfall, very low humidity, exposed soil with little plant cover, few trees and shrubs is
likely to be

A. A rain forest
B. A mangrove forest
C. A desert
D. A swamp
E. An estuarine

Question 485:

• WAEC 1997

Which of the following factors may not cause over-crowding?

A. Limited space
B. Scarcity of food
C. Reduced birth rate
D. Lose immigration conditions
E. Increased birth rate