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It can be seen on a cladogram that modern birds and reptiles share a common ancestor. Select the piece of evidence that best supports this idea.

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Pitxbullxgirl
It can be seen on a cladogram that modern birds and reptiles share a common ancestor. The piece of evidence that best supports this idea is Feathers are a derived characteristic that first evolved in reptiles.
Both today's birds and ancient reptiles had feathers.
alexvinitius

Answer:

       The right piece of evidence that best supports this idea is: Feathers

Explanation:

       The feathers can be a very good factor to compare both cladograms, once these feather can easily be found in primitive reptiles. Once we find a common characteristic, it's time to analyze the evidence by comparing both cladograms and see where these species, the birds and the reptiles, had a common ancestor, and if that's possible, other characteristics can be analyzed easily.