The first type of respiration that arose on E | vedclass

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(A) The early Earth's atmosphere was reducing in nature and lacked free molecular oxygen $(O_2)$.As the first primitive life forms evolved in this env

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Anaerobic

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(A) The early Earth's atmosphere was reducing in nature and lacked free molecular oxygen $(O_2)$.As the first primitive life forms evolved in this environment,they relied on anaerobic processes to generate energy.Therefore,the first type of respiration to arise was anaerobic respiration,which does not require oxygen.

The first type of respiration that arose on Earth was:

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