Cellular respiration is called an aerobic process because it requires

Cellular respiration is called an aerobic process because it requires oxygen.

Here's a step-by-step explanation:

1. Cellular respiration is the process by which cells in plants, animals and other organisms break down glucose and turn it into energy, which is then used to power cellular activity.

2. This process involves three stages: glycolysis, the Krebs cycle, and the electron transport chain.

3. Glycolysis, the first stage, occurs in the cytoplasm of the cell and does not require oxygen. It breaks down glucose into two molecules of pyruvate.

4. The second and third stages, however, do require oxygen. In the Krebs cycle, the pyruvate is further broken down and some ATP (the energy currency of the cell) is produced.

5. In the final stage, the electron transport chain, a large amount of ATP is produced. This stage requires oxygen to accept electrons and protons to form water.

6. Because the last two stages of cellular respiration require oxygen, the process is referred to as aerobic respiration. The term "aerobic" comes from the Greek word for "air," and refers to the process's dependence on oxygen.