It is the basic unit of energy for all functions of the cell without ATP the ions wouldn't be able to transport across the cell membrane.
I hope this helps!
If you're answers consist of:
<span>
a. mutation
b. genetic drift
c. inheritance of acquired characteristics
d. natural selection
Then you're answer is D.) Natural Selection
Hope this helped!! :)</span>
The definition of cell theory is as follows: <span>a </span>theory<span> in biology that includes one or both of the statements that the </span>cell<span> is the fundamental structural and functional unit of living matter and that the organism is composed of autonomous </span>cells<span> with its properties being the sum of those of its </span>cells<span>.</span>