Question #109432. Asked by Bronxiteone.
Last updated Aug 28 2016.
BRY2K
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BRY2K 17 year member
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Onions come in many different colors andsizes, but all are the same species. The dry bulbs are 89 percent water and 8 to 9 percent soluble sugars; the rest is minerals, fats, proteins, and sulfur compounds.