Answer:
This question lacks options, the options are as follows:
A. The overall reactions of photosynthesis and cellular respiration are the opposite of one another, therefore the products of one are the reactants of the other, creating a cycle.
B. The energy-and thus oxygen-flows for cellular respiration and photosynthesis take place in the same direction, and therefore build upon one another.
C. Cellular respiration is a process that deposits energy and oxygen, and photosynthesis withdraws energy and uses oxygen, therefore balancing each other.
D. Oxygen readily accepts electrons, so cellular respiration uses a negligible amount of oxygen.
The answer is A
Explanation:
All living organisms require energy to perform their cellular processes. This energy is obtained via a process called CELLULAR RESPIRATION, which is the process whereby glucose from food molecules is broken down to synthesize energy (ATP). Oxygen is used up in this process of cellular respiration. The equation is as follows:
C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP
However, on the other hand, another metabolic process called PHOTOSYNTHESIS, which occurs in plant cells make use of the products of cellular respiration to synthesize its reactants (food and oxygen). The equation is as follows:
6CO2 + 6H2O → C6H12O6 + 6O2
This means that cellular respiration and photosynthesis are opposite of one another, therefore the products of one being the reactants of the other helps create a cycle that explains what prevents Earth from running out of oxygen gas. In a nutshell, photosynthesis makes up for the oxygen used by cellular respiration.
