Cells require chemical energy for three general types of tasks: to drive metabolic processes that would not occur automatically, to transport substances across membranes, and to do mechanical work, such as moving muscles. Organisms generate chemical energy via cellular respiration. Analyze the illustration of cellular respiration and select the one piece that is NOT critical to the production of cellular energy.

A) food
B) oxygen
C) ATP molecules
D) carbon dioxide

The one piece that is not critical to the production of cellular energy is carbon dioxide

Explanation:

In the mitochondria, oxidative phosphorylation occurs, a process of oxidation of glucose - in the presence of oxygen - to make the ATP that is required as energy. This process requires:

Carbon dioxide is a sub-product of metabolism, and is not necessary for energy.

Learn more:

Oxidative phosphorylation link

i believe the answer is pupils are unequal and non-reactive

the pupil of both eyes has different size, so you could say the pupil is unequal. pupil has muscle that makes it able to constrict itself according to the light intensity. when the doctor direct their flashlight to the eye, pupil should be constrict to reduce the light intensity. if the pupil doesn't change their diameter, it is called unresponsive.