An opposable thumb is the condition in which the thumb (or first digit) is capable of bending in such a way that it can touch all the other digits on the hand or foot. Humans and opossums both have this trait, but their most recent common ancestor did not. Which of the following terms best describes this similarity between humans and opossums? Monophyly Homoplasy Autopolyploidy Homology
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This suggests that the trait has evolved independently in these two species. Show more…
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