<span>Vitamin D is the only vitamin the body can produce naturally.
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Vitamins dont contain calories. only fat, protein, and and carbohydrates contain calories. vitamins are chemicals that the body needs in small amounts to to support biochemical reactions.
Dichotomous Key is an important tool in determining the identity of an organism and other objects in nature. Hopefully I helped :) Give me 5 stars and brainiest!!
