Which of the following shows the largest ratio of brain size to body mass?
Correct answer: B. humans
- A. chimpanzees
- B. humans
- C. elephants
- D. dolphins
Explanation
Humans have the highest encephalization relative to body mass among these choices, reflecting a particularly large brain for their body size. Elephants and dolphins have large brains, but their brain-to-body ratios are lower.
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