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!!!!!!!!
Answer:
Photosynthesis
Explanation:
Photosynthesis is the process by which green plants use sunlight to produce their food
Option C. Organisms were probably more complex during past eras.
If you applied then no it it isn’t but if u didn’t it could be....
