It was the plants around us. They give us air to breath. It was to help us breath so we can live.
<span> Eukaryotic cells are a lot more complex. They
have a nucleus in a nuclear membrane, where DNA or other genetic
information is stored, as well as lots of organelles that serve
different functions.</span>
Answer: Two smaller molecules join together after a water molecule is removed from between them. Energy is absorbed for bond formation: because energy is absorbed to make bonds, synthesis reactions are energy absorbing reactions.
Explanation:
