Waec Biology Past Questions and Answers

Question 1671:

• WAEC 2016

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

Question 1672:

• WAEC 2016

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

Question 1673:

• WAEC 2016

The type of placentation illustrated in the diagram above is

A. Marginal
B. Perietal
C. Axile
D. Basal

Question 1674:

• WAEC 2016

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

Question 1675:

• WAEC 2016

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