Why are groups of small cells better than one large cell at moving material in

and out?

O

A. They have a lower surface-to-volume ratio.

O

B. They have a greater surface-to-volume ratio.

WO C. They have a smaller volume.

O

D. They have more cell structures.

I think it is A

Explanation:

The surface area--to-volume ratio makes the small cells more efficient, not the rate of diffusion. Smaller cells, with a larger surface area--to--volume ratio, are more efficient for diffusing materials in and out because, as a cell grows, the volume grows faster than the surface area.