WAEC Biology 2009 Objective — Question 14

Question 14 of 60 from the West African Examinations Council (WAEC) Biology 2009 Objective paper, with the correct answer and a full explanation.

The following characteristics are associated with the mammalian lungs except

A. A. large surface area
B. B. expandableCorrect
C. C. moist surface
D. D. highly vascularized

Explanation

A respiratory surface has the following features: a thin surface to enhance diffusion, moist, well vascularised (supplied with enough blood vessels), and a large surface area. (Note: the exact option text for this item was not fully legible in the source scan; the answer is based on the properties of a good respiratory surface described in the key.)

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