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Evolution

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Biology

Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Mention the type of nutrition in the cells originated first during the origin of life.

Heterotrophic nutrition.

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Arrange the following substances in a proper sequence with regard to the formation of chemical constituents at the time of origin of life :

Sugar, methane, nucleic acid and amino acid.

Methane—sugar—amino acid—nucleic acid.

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Miller created electric discharge in a closed flask that contained CH_4,NH₃, H₂ and water vapour at high temperature like 800

° C

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Mention the type of evolution that has brought the similarity as seen in potato tuber and sweet potato.

Convergent evolution.

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Which group of organisms were responsible for appearance of free oxygen in the atmosphere of the primitive earth ?

Aerobic photoautotrophs resembling the present day blue green algae or cyanobacteria.

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