Waec Biology 2010 Past Questions and Answers

Question 51:

• WAEC 2010

An example of a saprophytic relationship is a / an

A. Vulture feeding on decaying meat
B. Mushroom growing on decaying vegetation
C. Boy eating stale bread
D. Earthworm feeding on decaying vegetation.

Question 52:

• WAEC 2010

In artificial selection, individuals without desirable traits may be prevented from mating by

A. Outbreeding
B. Sterilization
C. Inbreeding
D. Genetic engineering

Question 53:

• WAEC 2010

In a family of eight (8) all the children are girls Which of the following reasons correctly explains this?

A. The woman cannot produce male children
B. The man has a low sperm count
C. The Y component of the man’s sex chromosome was always involved
D. The X component of the man’s sex chromosome was always involved.

Question 54:

• WAEC 2010

Which of the following statements is correct about the structure of a chromosome? A chromosome consists of

A. Two chromatids joined at the centromere
B. Two chromatids joined at the spindle
C. Two chromatin threads joined at the centrioles
D. Thread-like structures not joined together

Question 55:

• WAEC 2010

Mr. Andrew, his wife and child belong to blood groups A, B and O respectively. The genotypes of both parents are

A. I^A I^O and I^B I^B
B. I^A I^A and I^B I^B
C. I^A I^B and I^A I^O
D. I^A I^O and I^B I^O.