Question

how does meabolism rate affect the cell size?

Answer 1

Heya! 

Here is your answer!
==========================================================

As the cell increases, the ratio of surface area to weight of the cell decreases. This decreases the efficiency of the rate of diffusion and metabolism of the cells.

Therefore, the larger cell, the less efficient. To maintain the effectiveness of the body, a large cell will divide rather than continue to grow. Multicellular organisms grow by increasing the number of cells rather than due to increased cell size.

==========================================================

Hope it helped!