He concluded that all cells come from preexisting cells.
I believe it's aerobic exercise.
Answer:
hey what if you dont know it
Explanation:
Biological structures like DNA, proteins and cells all depend on molecules. ... Neurotransmitters like epinephrine are pretty simple molecules, but without them our nervous system couldn't work. Oxygen, containing just two oxygen atoms, is a very simple molecule, and it is certainly essential to living things.