Dehydration synthesis :) it means that monomers (like glucose or lactose) when bonded together release water molecules
Answer:
The genes for all organisms are composed of the same building blocks.
Explanation:
If later is was 100 million years ago, later b would be 200 million years ago (because it is 100millions years prior to a). And therefore layer c must b 300 million years ago.
I'm not sure but I think the answer is A. Plants. Then again I'm not 100% sure that this is correct
