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JAMB Biology 2008 Question 46

Question 46

Homeostasis

Use the graph to answer: From the graph above, it can be appropriately deduced that

Diagram for this question
  1. A.the body temperature in II varies with that in I
  2. B.the body temperature in I is independent of external temperature
  3. C.I and II maintain constant body temperature
  4. D.external temperatures affect the body temperature of I and II.
Show the answer and explanation

Answer: B (the body temperature in I is independent of external temperature)

Explanation

Line I stays flat at about 37–40 °C whatever the external temperature, while line II rises with it. So I's body temperature does not depend on its surroundings.