Asian elephants and African elephants have a common ancestor. Over time, genetic differences between them developed as a result of natural selection. Look at the two photographs below. An African elephant is shown on the left, and an Asian elephant is shown on the right.
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What physical difference that is linked to a genetic trait is evident?
a
The African elephant is slender, and the Asian elephant is stout.
b
The African elephant has a smaller trunk than the Asian elephant.
c
The African elephant has larger ears than the Asian elephant.
d
The African elephant has wrinkled skin, and the Asian elephant has smooth.