Question

The key to life on earth can be found in the reciprocity of photosynthesis and cellular respiration

Answer 1

Hi, angel!

The possible answer choices for this question, if anyone is confused, are listed below:

A. Photosythesis is responsible for providing the oxygen needed for all life forms on earth.

B. Carbon dioxide and oxygen are exchanged by organisms through these two processes: photosynthesis and cellular respiration.

C. Cellular respiration, through the breakdown of glucose, supplies the oxygen needed for aerobic metabolism by most organisms on Earth.

D. Photosynthesis is responsible for the transformation of solar energy into usable chemical energy, glucose, used by most organisms on Earth.

The correct answer to your question is D. Photosynthesis is responsible for the transformation of solar energy into usable chemical energy, glucose, used by most organisms on Earth.

Answer 2

Photosynthesis is a processes in which green plants fixes atmospheric carbon dioxide into carbohydrate using solar energy and oxygen is released as by-product in the process. Oxygen is used by all living cells during cellular respiration for breakdown or oxidize carbohydrate to release energy and carbon dioxide. So, life on earth is largely dependent on these two processes,  thus photosynthesis and respiration are considered as reciprocity for life on earth.