Which of the Following Morphological Differences Is Most Likely Due

Which of the following morphological differences is most likely due to a change in the relative growth rates of morphological structures during embryogenesis?

A) the large jaw of human adults compared to ancestral apes
B) the shortened fingers of bats compared to those of their ancestors
C) the absence of hind limbs in whales compared to their terrestrial ancestors
D) the presence of reproductive organs in the terrestrial form of salamanders

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