In the Northern Hemisphere, climate scientists observe seasonal fluctuations in carbon dioxide concentration with the highest levels measured in May and the lowest in October. Hypothesize how photosynthesis can account for these fluctuations. Explain your answer in three to five sentences.

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Explanation:

It means that in the Northern Hemisphere, the photosynthetic activities of plants peaks in October and is lowest in May.

Photosynthesis generally involved the fixation of carbon dioxide. The gas combines with other inorganic products like water and radiant energy from the sun to form sugar in plants. Hence, the photosynthetic activity of plants in an area is inversely proportional to the carbon dioxide level of the area. When photosynthesis goes up, the carbon dioxide level in the atmosphere comes down, and vice versa.

a.) a destruction fo cells by viral reproduction

i think it is dna, i'm not totally sure but i think it might be.