Waec Biology 1997 Past Questions and Answers

Question 46:

• 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 47:

• 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

Question 48:

• WAEC 1997

Crops grown mainly to feed animals are called

A. Forage crops
B. Here crops
C. Wood crops
D. Oil crops
E. Spices

Question 49:

• WAEC 1997

The farming practice by which an exhausted farm land is left for a number of years before cultivation is
known as

A. Crop rotation
B. Continuous cropping
C. Monocropping
D. Bush fallowing
E. Mixed cropping

Question 50:

• WAEC 1997

In palm-wine, yeast acts as a

A. Carrier
B. Culturing agent
C. Preservative
D. Catalyst
E. Sweetening agent