Answer:
Photosynthesis and cellular respiration is not restricted to just plants and just animals.
Step-by-step explanation:
Photosynthesis is the opposite reaction of cellular respiration. The equation for photosynthesis is:
6CO2 + 6H2O + (energy) ---> C6H12O6 + 6O2
If you reverse the reaction:
C6H12O6 +6O2 ---> 6CO2 + 6H2O + (energy)
You get the chemical equation for cellular respiration.
The relationship between photosynthesis and cellular respiration is that they are opposite reactions of one another.
One example of these reactions not being limited to their respected plants/or/animals is that photosynthesis is also performed by protists, which include algae and other single-celled organisms, that are technically not considered plants OR animals.
Another example is that plants also participate in the process of cellular respiration. Plants use photosynthesis to grow and produce glucose, and they use cellular respiration to break down the glucose formed from photosynthesis to release energy.