The endocrine system or the skin (:
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If carbon dioxide and water were abundantly available to a heterotrophic prokaryotic cell, then it would only take sunlight to proceed with photosynthesis to produce carbohydrates such as glucose and other sugars. <span>prokaryotes were recognized as the first organisms that evolved in Earth.</span>
On the average, about 25% of a teenager's total daily energy intake comes from snacks, this number is quite high, since the intake of other foods, such as proteins, vitamins and micronutrients are affected, unbalancing growth and developing diseases in young people.
