Waec Biology 2011 Past Questions and Answers

Question 21:

• WAEC 2011

During sexual reproduction in Paramecium, how many times does the zygote divide to produce eight nuclei?

A. 1
B. 2
C. 3
D. 4

Question 22:

• WAEC 2011

The testes in male mammals descend into the scrotal sac because

A. There is congestion in the lower abdomen
B. They run the risk of being destroyed
C. They need special support
D. They require a relatively low temperature

Question 23:

• WAEC 2011

Some animals return to water bodies to reproduce because

A. Natural enemies destroy their eggs on land
B. Water nourishes their embryos and their young ones
C. They are close to their ancestors and imitate them
D. The temperature on land is not suitable for the development of their embryos

Question 24:

• WAEC 2011

Which of the following methods is appropriate for the cultivation of cassava?

A. Budding
B. Fragmentation
C. Root cutting
D. Stem cutting

Question 25:

• WAEC 2011

What will be the chromosome number of the hybrid of two varieties of a plant with 36 chromosomes in the endosperm cell?

A. 12
B. 24
C. 35
D. 48