Question

under what environmental conditions do yeast carry out fermentation? multiple choice aerobic low ph absence of oxygen high temperature

Explanation:

Yeast fermentation is an anaerobic process, meaning it occurs in the absence of oxygen. Aerobic conditions involve oxygen (so yeast would respire aerobically then, not ferment). Low pH and high temperature are not the primary defining conditions for yeast fermentation; the key is the lack of oxygen to trigger fermentation (producing ethanol and CO₂).

Answer:

C. absence of oxygen (assuming the third option is labeled C; if the original labels differ, adjust the identifier but the text is "absence of oxygen")