WAEC Agricultural Science Past Questions & Answers - Page 9

41.

Study the table below and use it to answer the question

 Cost Price (N)  Useful life (Years)  Salvage value (N)  Annual depreciation (N)  Total depreciation
 20000  Y  5000  1000 annum  15000
 60000  10  18000  4200 annum  Z

The total depreciation represented by Z in the illustrated table is

A.

N42,000

B.

N78,000

C.

N22,200

D.

N55,800

Correct answer is A

Cost Price (N) = 60000
Salvage value (N) = 18000
Annual depreciation (N) = 4200
Useful life (Years) = 10
The formula to calculate the total depreciation is:
Total depreciation = (Cost Price - Salvage value) / Useful life
Now, let's plug in the values:
Total depreciation = (60000 - 18000) / 10
Total depreciation = 42000 / 10
Total depreciation = 4200
Therefore, the total depreciation represented by Z in the table is N 42,000.

42.

Study the table below and use it to answer the question

 

 Cost Price (N)  Useful Life (Life)  Salvage value (N)  Annual depreciation (N)  Total depreciation
 20000  Y  5000  1000 annum  15000
 60000  10  18000  4200 annum  Z

The useful life represented by Y in the illustrated table is

A.

3 years

B.

4 years

C.

15 years

D.

20 years

Correct answer is C

Cost Price (N) = 20000
Salvage value (N) = 5000
Annual depreciation (N) = 1000
Total depreciation = 15000
The formula to calculate the useful life is:
Useful life = (Cost Price - Salvage value) / Annual depreciation
Now, let's plug in the values:
Useful life = (20000 - 5000) / 1000
Useful life = 15000 / 1000
Useful life = 15 years
Therefore, the useful life represented by Y in the table is 15 years.

43.

The bacterium which is responsible for conversion of ammonium compounds to nitrites in the nitrogen cycle is

A.

Nitrobacter

B.

Rhizobium

C.

Nitrosomonas

D.

Azotobacter

Correct answer is B

Nitrosomonas is the bacterium responsible for the first step in this conversion process, where it oxidizes ammonium compounds to nitrites. This conversion is essential as it prepares the nitrogen compounds for the subsequent steps in the nitrogen cycle.

44.

The risk of production in agricultural business is borne by the

A.

Farm owner

B.

Farm labour

C.

Farm assistant

D.

Farmer's family

Correct answer is A

Farm owner is the one who bears the risk of production in agricultural business, as they have the ultimate responsibility for the business's success or failure and make critical decisions that impact the farm's performance and profitability.

45.

The diagram below illustrates a reproductive process in a farm animal. Study it and answer the question.

The foetus obtains dissolved oxygen and nutrients from the dam through the parts labelled

A.

I and II

B.

II and III

C.

I and III

D.

III and IV

Correct answer is D

The foetus obtains dissolved oxygen and nutrients from the dam through the parts labelled III and IV