Jamb Agricultural Science 2021 Past Questions and Answers

Question 36:

• JAMB 2021

The correct sequence in the processes of crop improvement is

A. Introduction → selection → breeding
B. Breeding → selection → introduction
C. Breeding → introduction → selection
D. Introduction → breeding → selection

Question 37:

• JAMB 2021

A condition in which a gene does not manifest observable characteristics in the presence of its dominant allele is known as

A. Dominance
B. Mutation
C. Recessiveness
D. Homozygosity

Question 38:

• JAMB 2021

If 100 pieces of pests is attacking an hectare of cocoa farm and 25% suddenly died while 40% of the remnant is sent for medical examination. What is the number of pest remaining?

A. 45
B. 50
C. 25
D. 75

Question 39:

• JAMB 2021

If 200 layers will consume 25kg of feed per day. Calculate the amount of feed consumed by a layer per day.

A. 0.25kg/day
B. 0.2kg/day
C. 0.5kg/day
D. 0.125kg/day

Question 40:

• JAMB 2021

Calculate the salvage value of a tractor with a depreciation value of ₦10,580.00 and initial cost of ₦50,000 after a year of use

A. ₦10,580
B. ₦30,290
C. ₦39,420
D. ₦60,580