Question

Why cells are generally small in size?

Answer 1

Maintaining cell size:

1. Cells are so little, so they can maximize their ratio of surface area to volume.
2. Smaller cells have a higher ratio which allow more molecules and ions move across the cell membrane per unit of cytoplasmic volume.
   
3. Cells are so small because they need to be able to get the nutrients in and the waste out quickly.
   
4. Their specific surface area with respect to the volume of the cytoplasm allows them to regulate the exchange of specific molecules inside the system.