Biology 2012 Waec Past Questions and Answers

Question 61 :

• WAEC 2012

Which of the following sequences is the correct evolutionary trend in plants?

A. Algae → liverworts → mosses → ferns
B. Liverworts → mosses → ferns → algae
C. Mosses → algae → ferns → liverworts
D. Ferns → Liverworts → mosses → algae

Question 62 :

• WAEC 2012

In the diagram, the arrow labelled II represents the

A. Release of oxygen
B. Intake of carbon (IV) oxide
C. Movement of photosynthates
D. Movement of nutrients

Question 63 :

• WAEC 2012

In the diagram, the function of the part labelled is to

A. Produce egg cells
B. Protect sperms during fertilization
C. Secrete hormones during coitus
D. Protect the developing embryo

Question 64 :

• WAEC 2012

(a) Explain briefly four factors that affect the diffusion of substances.
(b) Explain the following terms:
(i) active transport
(ii) transpiration.
(c) State four ways by which plants can reduce high rate of transpiration.
(d) State the features of red blood cells and how these features adapt the cell to perform its functions.

Question 65 :

• WAEC 2012

(a) Describe briefly the role of the stomach in digestion.
(b) (i) Name three parts of plants in which food can be stored.
(ii) Give one example in each case.
(c) Explain briefly how the level of sugar in the mammalian blood can be regulated.