WAEC Biology 2009 Question 20

Question 20

Homeostasis

The graph in Fig. 1 shows the results of a laboratory investigation which measured the body temperatures of a lizard and a bird under changing artificial conditions.
What physiological term can be used to describe the regulation of the body temperature of the lizard?

A.Homeostasis
B.Homoithermy
C.Poikilothermy
D.Osmoregulation

Show the answer and explanation

Answer: C (Poikilothermy)

Explanation

The lizard's body temperature changes with its surroundings; animals like this are poikilothermic (cold-blooded).