How are photosynthesis and cellular respiration different?
a. photosynthesis produces carbon dioxide, while cellular respiration
produces oxygen.
b. photosynthesis stores energy, while cellular respiration releases
energy
c. photosynthesis occurs in mitochondria, while cellular respiration
occurs in chloroplasts.
d. photosynthesis breaks down glucose, while cellular respiration
produces glucose.

The correct answer is B photosynthesis stores energy,while cellular respiration releases energy.

Explanation:

Photosynthesis is an anabolic process that utilizes the atmospheric CO2 along with water molecule as a electron donor to generate glucose sugar and oxygen gas.Photosynthesis helps to store the light energy in form of chemical energy in the bonds of glucose molecules produced during photosynthesis..

 on the other hand cellular respiration is a catabolic process that oxidizes glucose to generate energy in form of ATP along with CO2 and water as a byproduct.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.