Waec Biology 2013 Past Questions and Answers

Question 51:

• WAEC 2013

Which of the following features is used by chameleons to escape predation?

A. Fearsome appearance
B. Coiling tail
C. Offensive smell
D. Adaptive colouration

Question 52:

• WAEC 2013

A scientist who was involved in the development of evolution theory is

A. Lamarck
B. Mendel
C. Morgan
D. Pasteur

Question 53:

• 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 54:

• 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 55:

• 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.