Which is the relationship between photosynthesis and cellular

Photosynthesis involves the use of energy from sunlight, water and carbon dioxide to produce glucose and oxygen. Cellular respiration uses glucose and oxygen to produce carbon dioxide and water. Photosynthesis and respiration work together in many ways. They both have to exist in symbiosis. Without photosynthesis, cellular respiration cannot occur, and without cellular respiration, photosynthesis cannot occur.

Explanation:

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.