Question 28
HomeostasisThe graph above shows the relationship between the body and atmospheric temperatures for dog and lizard. What is the most appropriate deduction that could be made from the graph?
- A.Lizards are more likely to survive hazards than dogs
- B.Both animals maintain a constant body temperature
- C.The dog's body temperature is independent of the external temperature
- D.The lizard's body temperature varies with that of the dog.
Show the answer and explanation
Answer: C (The dog's body temperature is independent of the external temperature)
Explanation
The dog's line stays flat near 40 °C whatever the outside temperature, so it is independent of it; the lizard's body temperature rises with the surroundings.