Is the oxygen required by the single-celled organisms obtained by diffusion or osmosis through the surface membrane of the cell?
The Attempt at a Solution
I'm thinking osmosis since there's a membrane through which the oxygen passes. But I've been looking at definitions of osmosis and some talk of osmosis is only to do with water moving from high to low concentration. Diffusion is about any molecule moving anywhere.
Bit confused. Please advise. Thank you