WAEC Past Questions and Answers - Page 3837

19,181.

A piece of yam weighing 1.0 gm was put into some salt solution. After 3 hours, it was removed and weighed.
The recorded weight was 1.2gms. This simple experiment demonstrates that the

A.

salt solution is more concentrated than the cell sap of the yam

B.

cell sap of the yam is more concentrated than the salt - solution

C.

 salt solution has the same concentration as the cell sap of the yam

D.

the yam lost some water molecules to the salt solution

Correct answer is B

No explanation has been provided for this answer.

19,182.

Economics can be best defined as the study of

A.

How to spend the family income efficiently

B.

How to find minimum cost of production

C.

The interpretation of scarce resource and date

D.

How scarce resource can be used efficiently

E.

Why resource are scarce

Correct answer is D

No explanation has been provided for this answer.

19,183.

The following are abiotic components of an ecosystem except

A.

temperature

B.

oxygen

C.

bacteria

D.

soil

Correct answer is C

No explanation has been provided for this answer.

19,184.

Carbohydrates are stored in the animal cell in the form of

A.

starch

B.

glycogen

C.

plastid

D.

maltose

Correct answer is B

No explanation has been provided for this answer.

19,185.

Which of the following is not an advantage of price control?

A.

Control of inflation

B.

Distortion of price mechanism

C.

Prevention of exploitation

D.

Control of producer’s profit

E.

Helping low income earners

Correct answer is B

No explanation has been provided for this answer.