Question

Evaluate this statement. Is it correct? Pick the option that has the best argument for/against this claim.

Answer 1

The best argument against anaerobic respiration being only used when aerobic respiration is not an option would be that some organisms are able to carry out both processes depending on the availability or otherwise of oxygen.

In other words, that anaerobic respiration is only used when aerobic respiration is not an option is technically not correct.

This is because:

• some organisms are able to use aerobic and anaerobic respirations depending on their physiological conditions and that of their environment.
• when oxygen is available, they respire aerobically, otherwise, anaerobic respiration takes over.

Only obligate anaerobes are not able to use aerobic respiration.

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