Biology

What is the outermost covering of trees and some plants called?

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How long can an anteater's tongue get?
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What is a cell that provides energy for another organism called?
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Which pair of animal species and type is correct?
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A single piece of coiled DNA is called what?
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What part of the blood helps clotting?
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What do red blood cells carry throughout the body?
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What substance in your ears helps keep germs and dirt out?
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Pregnancy in humans lasts how many days?
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