Question

Explain how? Photosynthesis and cellular respiration are linked in that the products of one are the reactants of the other.

Answer 1

Photosynthesis is a cycle used by plants and other life forms to convert light energy into compound energy that can then be delivered to fuel the creature's metabolic activities via cell breath. Cellular respiration is a collection of metabolic responses and cycles that occur in organic entities' cells to convert substance energy from oxygen atoms or supplements into adenosine triphosphate.

Complete answer:
The exact opposite of photosynthesis is cellular respiration.
The reactants of photosynthesis are the components of cellular respiration.
Photosynthesis products are the reactants in cellular respiration.
In Photosynthesis the following reaction occurs:

In Respiration the following reaction occurs:

Cellular respiration cannot occur without the oxygen and glucose sugar which are ultimately generated by the process of photosynthesis. The cellular respiration and photosynthesis are opposite. Photosynthesis is an anabolism while breathing is a catabolism.
Carbon dioxide and water form energy-rich glucose in photosynthesis. In chemical energy, light energy is stored.
Glucose is oxidised in the cellular respiration into water and carbon dioxide in the presence of oxygen. The ATP is discharged as an energy source.

Note:
The reason for cellular respiration is basic: it gives cells the energy they need to work. Cellular respiration includes catabolic response to separate food into usable energy so cells, and the living life forms that contain them, can endure and thrive. Photosynthesis is imperative to living creatures since it is the main source of oxygen in the environment. Green plants and trees use photosynthesis to make food from daylight, carbon dioxide and water in the climate: It is their essential wellspring of energy.