Waec Agricultural Science 2016 Past Questions and Answers

Question 26:

• WAEC 2016

The process of crossing two pure lines of plants of the same species is called

A. Selection
B. Genotype improvement
C. Hybridization
D. Inbreeding

Question 27:

• WAEC 2016

Pure line of crops are produced through continuous

A. Selection
B. Hybridization
C. Cross breeding
D. Inbreeding

Question 28:

• WAEC 2016

Which of the following insects transmits swollen shoot virus of Cocoa?

A. Stem borer
B. Mealybug
C. White fly
D. Capsid

Question 29:

• WAEC 2016

Quarantine regulations are established so as to

A. Allow the importation of diseased plant and animal materials
B. Prevent the introduction foreign diseases into country
C. Assist farmers to grow foreign crops
D. Facilitates the rapid spread of foreign diseases

Question 30:

• WAEC 2016

The most effective method of controlling viral diseases in crops is by

A. Spraying with bordeaux mixture
B. Renoving and burning affected crops
C. Practicing crop rotation
D. Planting at recommended spacing