They convert energy from food into energy the cell can use - Answer
Some man-made fibres, too, are derived from naturally occurring polymers. For instance, rayon and acetate, two of the first man-made fibres ever to be produced, are made of the same cellulose polymers that make up cotton, hemp, flax, and the structural fibres of wood.
160lbs also WHO IN THEIR RIGHT MIND WOULD ASK SUCH A QUESTION!?!?!?
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Is ther supposed to be a list or a picture ?
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