Question

how do unicelluar organisms respire​

Answer 1

Unicellular organisms do not breathe in the typical sense, but they respirate by allowing oxygen to enter the cell membrane through the process of diffusion. Because they are so small, they do not have the organs, pores and entryways to breathe like multicellular organisms.

Answer 2

Explanation:

Cellular respiration takes place in each and every living cell. The mechanism of 'breathing' in unicellular organisms is different from multi-cellular organisms. Single celled organisms like Amoeba, Paramoecium etc. respire within their cell. Instead of the actual process of breathing, oxygen simply enters in their bodies by simple diffusion. They don't have any breathing system.

Hope it helps you!!:)