Answer:
Cells divide so living things can grow. When organisms grow, it isn't because cells are getting larger. Organisms grow because cells are dividing to produce more and more cells.
The dark reactions happen<span> in the stroma of the </span>chloroplasts<span>. This is also known as the Calvin Cycle. </span>
Mass divided by volume, the equation for that would be M/D=D
Climate change is melting the polar ice caps and releasing green house gasses into the atmosphere. Because of this the Earth's sea levels are rising. The amount of liquid water is increasing.