Which statement best describes the relationship between photosynthesis and cellular respiration?
photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.
photosynthesis is part of the carbon cycle, and cellular respiration is not.
only plants perform photosynthesis, and only animals perform cellular respiration.
photosynthesis releases carbon into the atmosphere, and cellular respiration removes carbon from the atmosphere.

The correct answer will be option photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere.

Explanation:

Photosynthesis is a process by which plants and other photo-autotrophs    synthesize food using water and carbon dioxide from the environment in the presence of sunlight. Photosynthesis releases O₂ in the atmosphere.

6CO₂+ 6H₂O → C₆H₁₂O₆+ 6O₂.

Respiration is a process of oxidation of food or glucose to form energy molecule using oxygen. Respiration releases CO₂ in the atmosphere.

C₆H₁₂O₆+ 6O₂ → 6CO₂+ 6H₂O + ATP.

Since, photosynthesis use carbon dioxide from the atmosphere to make food while respiration uses oxygen and releases carbon dioxide to the atmosphere therefore, photosynthesis removes carbon from the atmosphere while cellular respiration releases carbon back into the atmosphere is the correct answer.

equal distribution i think.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.