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Both snakes and pangolins have scales covering their body. Though these animals are very different and...

Both snakes and pangolins have scales covering their body. Though these animals are very different and these structures appear similar and serve a similar purpose, they are not ___________.

a) homologous            b) analogous c) autapomorphies     d) synapomorphies

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Answer #1

Answer:

(B) homologous

Snakes are reptiles whereas pangolins are mammals. So these structures don't have a common origin, so they are not homologous. They are analogous because they have similar structure and function but different origin. Autapomorphy means presence of derived traits in a single group and Synapomorphy means presence of derived traits in shared groups. Scales of snake have a little different characteristics which makes it autapomorphic . The few differences makes it synapomorphic. So they are not homologous at all.

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