WAEC Biology Past Questions & Answers - Page 242

1,206.

Which of the following best describes a colony of volvox?

A.

Asexually reproduced cells held together in a mass, but independent of each other

B.

Sexually reproduced cells held together in a mass, and dependent on each other

C.

Single free-living acellular units irrespective of their parental origin

D.

Several units of cells, held together by cytoplasmic strands and dependent on each other

Correct answer is A

No explanation has been provided for this answer.

1,207.

Amoeba obtains its oxygen requirements 

A.

from oxidising food substances

B.

from air trapped in vacuoles

C.

through diffusion of air into its body

D.

through an air cavity in the ectoplasm

Correct answer is C

No explanation has been provided for this answer.

1,208.

Which of the following habitats cannot be used for the study of succession?

A.

Savanna grassland

B.

Abandoned farmland

C.

A pond

D.

Well cultivated land

Correct answer is D

No explanation has been provided for this answer.

1,209.

Which of the following traits may not be important in marriage counselling

A.

Sex-determination

B.

Sickle-cell anaemia

C.

Rhesus factor

D.

Colour of skin

Correct answer is D

No explanation has been provided for this answer.

1,210.

The passage of nerve impulse across a synapse is facilitated by the secretion of

A.

acetylcholine

B.

thyroxin

C.

insulin

D.

progesterone

Correct answer is A

No explanation has been provided for this answer.