Which is the best explanation for separating reptiles from mammals? O the presence of hair in reptiles that is not found in mammals O the presence of hair in mammals that is not found in reptiles the presence of an amniotic membrane in mammals that is not found in reptiles the presence of an amniotic membrane in reptiles that is not found in mammals

Q: 1. Identify traits that characterize all animals.

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A: We are answering first question for rest kindly repost

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A:

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Primate evolution

Primates are a relatively new species and first appeared in the fossil record nearly 55 million years ago. They may have originated as far back as the cretaceous period. Their fossils were observed in North America, Asia, and Europe. Long before the first monkeys and their prosimian relatives developed, most animal species thrived and died. The first primates did not exist until about 50-55 million years ago, even though the planet is 4.54 billion years old and the first life goes back at least 3.5 billion years. Dinosaurs had been extinct for 10 to 15 million years when this happened.