Answer:
they have to remain small because nutrients go around faster around the cell then bigger cells
Explanation:
hopefully i explained it well
The menstrual<span> cycle </span>occurs<span> due to the rise and fall of hormones</span>
<span>Weather occurs in Earth's troposphere, which is "Lowermost layer" of the the Earth
Hope this helps!</span>
ATP is adenosine triphosphate, it is like a fully charged battery in a cell, ADP is basically ATP that has been drained of its energy from a chemical reaction. It is like a dead battery that can be recharged later ;)