Question

in single celled organism diffusion is sufficient to meet of their requirement of food, exchange of gases but it is not in case of multi cellular organism. explain the reason for this difference

Answer 1

Yes because the organ system of the single celled organism are simple and ours are complicated.

Answer 2

In single cell organism there is only one cell and the size of that particular organism will also be small so diffusion from one cell is sufficient but in multicellular organism like human there is million of cells if the diffusion take place then it take a lot of time in transport materials.so, diffusion is not sufficient for any multicellular organism.