Refer to the Figure

Refer to the figure. Referring to the phylogenetic tree of amniotes shown, describe the evolutionary origin of the following traits: endothermy, hair, and feathers.Which of these traits appears to have evolved convergently in more than one lineage? What is a likely functional relationship among these traits? What are some reasons why many paleontologists think many extinct theropods were endothermic?

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Among the living tetrapods, birds and ma...

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