Question

Which is the breathing organ in unicellular organisms?​

Answer 1

Explanation:

Unicellular organisms donot have any respiratory organs. The mechanism of 'breathing' in unicellular organisms is different from multicellular organisms. Unicellular organisms respire within their cell.

Answer 2

Answer:

In unicellular organisms the single cell performs all the functions. So respiration is also performed by the same cell. The cell exchange the gases with the help of diffusion process