Final answer:
Glycolysis is an anaerobic process that does not require oxygen. It produces a small amount of ATP compared to processes that require oxygen.
Step-by-step explanation:
Glycolysis is an anaerobic process - it does not need oxygen to proceed. This process produces a minimal amount of ATP. The Krebs cycle and electron transport do need oxygen to proceed, and in the presence of oxygen, these processes produce much more ATP than glycolysis alone.