Question

why don't bacteria need any well defined system to respire gases?​

Answer 1

Explanation:

Single-celled organisms such as bacteria and amoebae do not have specialised gas exchange surfaces, because they can take advantage of the high surface area they have relative to their volume. ... However, as an organism increases in size, its surface area and volume do not scale in the same way.

Answer 2

Single-celled organisms such as bacteria and amoebae do not have specialised gas exchange surfaces, because they can take advantage of the high surface area they have relative to their volume. ... However, as an organism increases in size, its surface area and volume do not scale in the same way.

Explanation:

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