I think the correct answer from the choices listed above is option A. Cells divide in order to maintain a surface area large enough to support their cytoplasm. When they divide, their volume decreases which enables them to obtain enough nutrient and expel wastes.
Serve as energy-storage substances in plankton etc .
I am pretty sure that planet A will move faster and i know it will have a smaller orbit then planet B
The hydrogen bonds are responsible for the surface tension.
