I believe it is Epithelial Tissue. <span />
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It's solar, because s</span>olar energy is a renewable resource that is virtually endless as long as the sun shines.<span />
Answer:
I believe a layer deep underground would have older things, because the ground could erode over time causing the fossil to sink into the ground.
Answer:
im my opinion... the answer is A
Answer:
rex was covered in a coat of downy feathers
Explanation:
Some mammals did have hair but T. Rex mostly had feathers
