WAEC Biology Past Questions & Answers - Page 48

236.

When a Spirogyra filament is placed in a concentrated salt solution for 30 minutes, the cell would become

A.

plasmolysed

B.

turgid

C.

shortened

D.

elongated

Correct answer is A

No explanation has been provided for this answer.

237.

Which of the following cells is a specialized cell?

A.

Amoeba

B.

Plasmodium

C.

Guard cell

D.

Meristematic cell

Correct answer is C

No explanation has been provided for this answer.

238.

The structure of the cell membrane is a

A.

double layer and a double protein layer

B.

middle bi-layer of protein with a lipid layer on either surface

C.

middle bi-layer of lipid with a protein layer on either surface

D.

protein layer with two inner lipid layers

Correct answer is C

No explanation has been provided for this answer.

239.

Which of the following organisms is not a protozoan?

A.

Amoeba

B.

Ascaris

C.

Plasmodium

D.

Paramecium

Correct answer is B

No explanation has been provided for this answer.

240.

Study the diagram above and answer the question.

A decrease in the number of 11 will result in

A.

an increase in urine production

B.

an increase in energy production

C.

a decreased population

D.

decreased immunity

Correct answer is D

No explanation has been provided for this answer.