Where the carbon come from for cellular respiration if the carbon is expelled after the process of photosynthesis?

the answer would be d

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs