Waec Biology Past Questions and Answers

Question 486:

• 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 487:

• 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 488:

• WAEC 1997

In palm-wine, yeast acts as a

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

Question 489:

• WAEC 1997

Which of the following farm practices can cause loss of soil fertility?

A. Mulching
B. Compost application
C. Use of fertilizers
D. Terracing
E. Intensive cropping

Question 490:

• WAEC 1997

One of the use of variation is in

A. Determining the size and weight of an individual
B. Determining paternity
C. Conservation of wildlife
D. Controlling of disease vector
E. Sex determination