In which scenario would mitosis be the least desirable in terms of a species’ survival

A species has to adjust rapidly to a changing environment. Mitosis relies solely on mutations which, due to the high rate of reproduction imparted by such a simple system, do occur regularly but there is less room for adaption as the organism is mostly stuck with variations on one set of genes - most of which will be fatal.

I think its cellular respiration

Explanation:

During cellular respiration, glucose is broken down while oxygen was broken down from water. Therefore, oxygen is present. So that means that it is most likely respiration.

I hope this helps!