2. Look at Table 2: Common Radioactive Isotopes. Are there any sources of radiation you can now
definitely rule out? Explain your thinking.

there is none because earth is stationary and flat.

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.