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The earth was completely different 1 million years ago so animals had different features to adapt to the earth. Consider the Wooly Mamoth very similar to an elephant but it had hair due to the cold temperature, now elephants live in Africa where there is no snow so no need for hair
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The heart pumps the blood
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The leaf because it is the major structure of photosynthesis in a plant.
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the fingertip has more censors and nerves connected to the skin as compared to the palm
One of the most commonly damaged nervesduring head trauma is Cranial Nerve I, the olfactory nerve. ... The optic nerve, cranial nerve II, can be damaged by skull fractures. If sheared, it leads to permanent blindness in the affected eye.Apr 21, 2017
