Waec Biology Past Questions and Answers

Question 1521:

• WAEC 2013

Darwin noticed that organisms in similar habitats across the world looked alike. This illustrates

A. Convergent evolution
B. Adaptive radiation
C. Co-evolution
D. Descent with modification

Question 1522:

• WAEC 2013

(a) (i) What is respiration?
(ii) In a tabular form, state four differences between gaseous exchange and aerobic respiration
(b)(i) Explain the term residual air.
(ii) What is the importance of residula air to mammals?
(c) State four characteristic features associated with respiratory structures.
(d)(i) What is oxygen debt?
(ii) Outline three activities that can result in oxygen debt.

Question 1523:

• WAEC 2013

(a) What is photosynthesis?
(b) List: (i) four external factors
(ii) two internal factors; that affect the rate of photosynthesis.
(c)(i)List the major products of the light dependent stage of photosynthesis.
(ii)State the importance of each of the products listed in (c)(i) above.
(d)(i) Explain why there are no green plants at the lower depths of some lakes.
(ii) State why decomposers are important to flowering plants.

Question 1524:

• WAEC 2013

(a)(i) What is ecological succession?
(ii) Describe the process of ecological succession on a bare plot of land.
(b) Explain the following terms:
(i) biosphere
(ii)population
(iii)community
(iv)ecosystem.
(c) Name one instrument each used for measuring:
(i) relative humidity
(ii) wind speed

Question 1525:

• WAEC 2013

(a)(i) What is conservation?
(ii) State six factors responsible for the decline of the abundance and variety of wildlife.
(b) Outline six ways in which the government can improve the situation in (a)(ii) above.
(c)(i) What is Eutrophication?
(ii) State two causes of eutrophication.