It is super easy. it is on humans and please be my friend and no hand down please!!!!
Answer:
im about to do mine i will post when done
Explanation:
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.
HOPE THIS HELPS AND GOOD LUCK
MARK BRAINLIEST PLZ!!!!!!!!
I think salt is it
........................
<span>it has a specific activation site for enzyme attachment</span>