Waec Biology 2011 Past Questions and Answers

Question 56:

• WAEC 2011

A man with blood group It I^A I^A is married to a woman with blood group I^A I^O. The blood group of their son is likely to be

A. A
B. O
C. B
D. AB

Question 57:

• WAEC 2011

Natural selection is a consequence of

A. Distribution of organisms
B. Adverse conditions
C. Variation in organisms
D. Inbreeding

Question 58:

• WAEC 2011

Which of the following components of Larmark’s theory of evolution is considered faulty?

A. Individuals of the same species growing under different environmental conditions differ from each other
B. Use of certain organs result in development of those parts
C. Unused organs degenerate
D. Changes that result in individuals of the same species are transmitted to offspring

Question 59:

• WAEC 2011

A vestigial structure in humans is

A. Earlobe
B. Toe bone
C. Tail bone
D. Spleen

Question 60:

• WAEC 2011

Adenine pairs with thymine because

A. The two occur in the same nucleic acid
B. One is a strong base and the other a weak base
C. Two purine bases easily pair up
D. One is a purine base and the other a pyrimidine.