Which type of respiration does not require oxygen?

Anaerobic respiration is the type of respiration that does not require oxygen. This process occurs in environments where oxygen is not available or in cells that can operate without it. During anaerobic respiration, organisms convert glucose into energy and produce byproducts such as lactic acid in animals or ethanol and carbon dioxide in yeast.

In contrast, aerobic respiration, which is the first option, requires oxygen to efficiently produce energy through the complete oxidation of glucose. Cellular respiration as a general term refers to the biochemical processes used by cells to convert nutrients into energy, including both aerobic and anaerobic processes. Oxidative respiration specifically refers to the process that heavily relies on the presence of oxygen to carry out energy production, making it a form of aerobic respiration.

Overall, anaerobic respiration is critical for certain organisms and under specific conditions where oxygen is limited, allowing them to generate energy and survive.