why do you think a single-called organism does not need a respiration system?

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why do you think a single-called organism does not need a respiration system?

2007-11-14 06:53:39 · 2 answers · asked by Ẅ ī ¢ Ќ ∑ đ 1 in Science & Mathematics ➔ Biology

2 answers

Diffusion works just fine - even with multi-cellular organisms (look at planaria).

2007-11-14 07:02:57 · answer #1 · answered by nixity 6 · 1⤊ 0⤋

because they can readily absorb and expel all gases threw their membrane. with multi celled organisms you have to move those gases to areas that are not directly exposed... not the case with a single-cell.

2007-11-14 15:01:39 · answer #2 · answered by pip 7 · 0⤊ 0⤋