Which type of respiration appeared first in t | vedclass

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Question

(B) The primitive atmosphere of the Earth was reducing and lacked free molecular oxygen $(O_2)$.Therefore,the earliest living organisms had to rely on

Vedclass · Accepted Answer

Anaerobic respiration as there was no $O_2$.

Vedclass · Answer

(B) The primitive atmosphere of the Earth was reducing and lacked free molecular oxygen $(O_2)$.Therefore,the earliest living organisms had to rely on anaerobic respiration to generate energy from organic molecules.Aerobic respiration evolved much later after the accumulation of oxygen in the atmosphere due to the activity of photosynthetic organisms like cyanobacteria.

Which type of respiration appeared first in the primitive organisms and why?

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