Sperm whales are found in oceans around the world and are known to have the largest brain of any organism. The head of a sperm w
hale takes up about one–third of its body. Another anatomical characteristic of a sperm whale are the hind leg bones circled below.
In terms of evolution, which of the following statements best explains why the sperm whale has hind limb bones?
A: Ancestors of the sperm whale had hind legs to walk on land but the legs became useless when they moved to water.
B: Sperm whales began developing hind limbs to escape hunters and then hunting decreased as the population dwindled.
C: Sperm whales have legs when they are young and then they disappear since they are not needed in water.
D: Sperm whales are equipped with leg bones in case they need to move to land some day.
In terms of evolution, which of the following statements best explains why the sperm whale has hind limb bones?
A: Ancestors of the sperm whale had hind legs to walk on land but the legs became useless when they moved to water.
B: Sperm whales began developing hind limbs to escape hunters and then hunting decreased as the population dwindled.
C: Sperm whales have legs when they are young and then they disappear since they are not needed in water.
D: Sperm whales are equipped with leg bones in case they need to move to land some day.
2 answers:
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