Question

respiration involves the breakdown of sugar. this process results in the production of energy for the cell. assess the model to determine what gas must be present in order for cells to produce the most energy.
a oxygen
b nitrogen
c water vapor
d carbon dioxide

Explanation:

Cellular respiration is an aerobic process. Oxygen is required for the complete breakdown of glucose to produce the maximum amount of energy (ATP). In the model, the respiration equation shows glucose reacting with oxygen to produce carbon - dioxide, water, and energy.

Answer:

A. Oxygen