a. it is the first phase in both aerobic and anaerobic respiration
Glycolysis is the first phase of both aerobic and anaerobic respiration, which are two different processes that cells use to produce energy from glucose. During glycolysis, a molecule of glucose is broken down into two molecules of pyruvate, and energy is released in the form of ATP. This process does not involve the formation of glucose molecules or the breaking of ATP, and it is not a phase of photosynthesis, which is the process by which plants produce energy from sunlight.