Answer:
Explanation:
A number of things/people that populate on place
Quick Answer. Collagen is the protein that all animals have in common, even single-celled animals and creatures such as sponges that lack differentiated bodies. Collagen is a cable-like protein that can calcify into bone, shell or other hard structures.
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MARK BRAINLIEST PLZ!!!!!!!!
Cell wall.......... Hope it helps, Have a nice day :)
