Arrange the following in proper sequence of their formation.

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Photo autotrophs

Anaerobic heterotrophs

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Chemoautotrophs1. A-C-D-B.2. C-D-B-A. 3. C-B-A-D. 4. A-D-B-C

answer is B.

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Detailed Solution

concept - Earth has no lifestyle, lengthy year’s back, later after a while such a lot of reactions came about that made the formation of a few natural molecules, and those natural molecules shape the slightly greater complicated molecules along with proteins, carbohydrates, etc.
Life on earth started a few billion years ago, earlier than that the earth changed into so primitive, there were no lifestyles and there's no oxygen withinside the earth, after which later the natural molecules that have been gifted on earth go through adjustments and that they purpose the polymerization of such molecules, a few natural molecules along with amino acids they go through polymerization that shape proteins and this protein later go through similarly polymerization to shape the biomolecules along with proteins, nucleic acids, and the carbohydrates, etc. So genes are first shaped on the earth in line with the above-given collection.
As there was no oxygen on the earth at that time, there have been no manufacturers that produce natural carbon, in which chemoautotrophic organisms are used to synthesise the natural carbon via way of means of inorganic compounds along with iron, sulphur, and magnesium so that the second one withinside the collection is chemoautotrophs. And in those chemoautotrophs, there's no synthesis of

C O_{2}

and

O_{2}

on this process, and the byproducts of the chemoautotrophs are natural methane and sulphur.
Because of these chemoautotrophs, later anaerobic heterotrophs start to evolve to conform as they additionally don’t want oxygen for electricity production, and they rely on chemoautotrophs for their meals and electricity, so the subsequent one in this collection is anaerobic heterotrophs.
Hence, option 2 is the correct answer.

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