Water displacement, after all, the water that's displaced is used to calculate the volume of the irregular shaped object. Hope my answer helped!
Answer:
the book stays on the shelf???
Explanation:
A. Mass extinction is the answer
Answer - Cyanobacteria aka Algae that contributed in creating O2 for the atmosphere as a byproduct thru Photosynthetic.
Reason - Of course Algae make up mainly the whole world in waters and they do photosynthesis to give off oxygen in the atmosphere.
That would be peptide bonds
