First autotrophs on the primitive earth was/w | vedclass

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(B) Autotrophs are of two types:$(i)$ Chemoautotrophs: The organisms performing chemosynthesis are called chemoautotrophs. They were anaerobic. Chemoa

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Anaerobic

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(B) Autotrophs are of two types:$(i)$ Chemoautotrophs: The organisms performing chemosynthesis are called chemoautotrophs. They were anaerobic. Chemoautotrophs have the ability to synthesize organic molecules from inorganic raw materials. Such a mode of nutrition is present even now in some bacteria,$e.g.$,sulphur bacteria,iron bacteria,and nitrifying bacteria.$(ii)$ Photoautotrophs: The photosynthetic organisms,the photoautotrophs,contain the pigment chlorophyll,which is formed by the combination of simple chemicals. They prepared organic food by using solar energy captured with the help of chlorophyll. They lacked the biochemical pathways to produce oxygen. They were anaerobic and utilized hydrogen from sources other than water.

First autotrophs on the primitive earth was/were

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