Waec Agricultural Science 1996 Past Questions and Answers

Question 31:

• WAEC 1996

Biological control of insect pests of crops can best be carried out through

A. Crop rotation
B. Use of parasites and predators
C. Soil fumigation
D. Farm sanitation
E. Use of resistance varieties

Question 32:

• WAEC 1996

The aims of crop improvement include the following except

A. Increasing yields
B. Meeting particular needs of growers
C. Meeting the needs of consumers
D. Adapting to climatic conditions
E. Reducing demand for a particular type of crop

Question 33:

• WAEC 1996

The chromosomes in a cell are located in the

A. Cell wall
B. Golgi body
C. Vacuole
D. Nucleus
E. Mitochondrion

Question 34:

• WAEC 1996

A great disadvantage of introduction as a method of crop improvement is the

A. Adaptation of introduced crop to a new area of cultivation
B. Usefulness of an introduced crop as basis for a breeding programme
C. Incorporation of the desirable characteristics of the introduced crop into the local corp
D. Introduction of a new type of disease into a new area of cultivation
E. Integration of the introduced variety into the agricultural production of a new area

Question 35:

• WAEC 1996

Which of the following structures does not serve a protective function?

A. Hoof
B. Skin
C. Feathers
D. Bone
E. Hair