WAEC Biology Past Questions & Answers - Page 49

241.

Plant A was seen to appear as Plant B after seven hours. Study the above diagrams carefully and answer the questions.

The environmental factors responsible for the condition in plant B are

A.

low humidity and low temperature

B.

high humidity and low temperature

C.

low humidity and high temperature

D.

high humidity and high temperature

Correct answer is C

No explanation has been provided for this answer.

242.

Plant A was seen to appear as Plant B after seven hours. Study the above diagrams carefully and answer the questions.

The term that can be used to describe what happened to Plant A after seven hours is

A.

wilting

B.

competition

C.

transpiration

D.

Osmosis

Correct answer is A

No explanation has been provided for this answer.

243.

The type of placentation illustrated in the diagram above is

A.

marginal

B.

perietal

C.

axile

D.

basal

Correct answer is D

No explanation has been provided for this answer.

244.

The illustration above represents a cross between a colour blind male and normal female.
Study it carefully and answer the questions.

Which of the genotypes are carriers of colour blindness?

A.

1 and 11 only

B.

1 and 111 only

C.

11 and 111 only

D.

1, 11 and 111 only

Correct answer is A

No explanation has been provided for this answer.

245.

The illustration above represents a cross between a colour blind male and normal female.
Study it carefully and answer the questions.

What is the genotype ratio of carrier females to normal males in the cross?

A.

1:1

B.

2:3

C.

3:4

D.

4:1

Correct answer is A

No explanation has been provided for this answer.