The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Why is there anaerobic respiration even in organisms that live in aerobic condition like human beings and angiosperms ?

Explanation

In human beings aerobic respiration takes place under normal conditions but during hard workout more muscle power (ATP) is needed and more `O_(2)` is absorbed /in takes occurs for energy baiding
In muscles, in more need of oxygen its deficit arises so muscles start forming lactic acid so requirement of energy is satisfied during anaerobic respiration, similarly anaerobic respiration takes place in cells of yeast due to deficit of `O_(2)` and alcohol and `CO_(2)` are formed.