QUESTION--> <span>The nucleolus is where _______ are constructed.
</span>ANSWER--> C) ribosomes
Answer: The main organ of the integumentary system is the skin.
Explanation: The skin regulates body temperature, keeps germs from entering your body, and produces vitamin D to help absorb calcium.
Some scientists hypothesize that the eukaryotic cells are really the result of symbiotic processes!
Specifically, the internal organs of the cells could be a remnant of a symbiotic relationship in which one cell lived inside of another cell. These two cells then both split upon reproduction and eventually the cell inside was reduced to an organelle.
But according to this theory, it is very likely that the prokaryotic cells engaged in a number of symbiotic relationship, and that this actually lead to the emergence of eukaryotic cells!
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<span>The American Academy of Pediatrics recommends that all </span>babies<span> receive </span>vitamin D<span> supplementation (400 IU per day) due to decreased sunlight exposure and an increase in rickets.
Babies need this due to lack of sunlight exposure and is highly recommended if they're breastfed.</span>
