Waec Biology 2009 Past Questions and Answers

Question 56:

• WAEC 2009

A man who is heterozygous for the disease haemophilia marries a woman who is double recessive for haemophilia. What percentage of their offspring would have the disease?

A. 0%
B. 25%
C. 50%
D. 75%

Question 57:

• WAEC 2009

A dairy farmer allowed only his best milk producing cows to mate. In succeeding generations of cows: milk production increased. This outcome is an example of

A. Artificial selection
B. Natural selection
C. Competition
D. Cross fertilization.

Question 58:

• WAEC 2009

Cytokinesis of mitosis is a process that ensures that

A. Each daughter cells gets the necessary organelles
B. There is distribution of a complete set of genes into each daughter cell
C. Daughter cells inherit new genetic combinations.
D. Worn out organelles are excluded from daughter cells

Question 59:

• WAEC 2009

An animal which is active during the day is known as

A. Nocturnal animal
B. Diurnal animal
C. Terrestrial animal
D. Homoiothermic animal

Question 60:

• WAEC 2009

Evidence for evolution include the following except

A. Fossil records
B. Comparative anatomy
C. Mutation of genes
D. Geographical distribution of genes