Assertion: The earliest organisms that appear | vedclass

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(A) The earliest organisms that appeared on the earth were heterotrophic because of the reducing atmosphere,and the first autotrophs were chemoautotro

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

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(A) The earliest organisms that appeared on the earth were heterotrophic because of the reducing atmosphere,and the first autotrophs were chemoautotrophs.An anaerobic organism does not require oxygen for growth and may even die in its presence. Chemoautotrophs were the first autotrophic organisms to appear on Earth,obtaining energy by the oxidation of inorganic molecules in their environment. These organisms did not release oxygen as a byproduct of their metabolic processes. Therefore,both the Assertion and the Reason are correct,and the Reason provides a valid explanation for the nature of the earliest organisms.

Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
Reason: The first autotrophic organisms were the chemoautotrophs that never released oxygen.

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Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes.Reason: The first autotrophic organisms were the chemoautotrophs that never released oxygen.