Which is the role of respiration in the carbon cycle?

Respiration is the process in which carbohydrates are converted to water and carbon dioxide, so that carbon is released again into the air. So, during this process, both animals and plants retur the carbon dioxide they had previously inhaled back to the atmosphere so that the carbon cycle can continue.

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Explanation:

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he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?