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Assertion (A) : The earliest organisms t...

Assertion (A) : The earliest organisms that appeared on the Earth were non-green and presumably anaerobis.
Reason (R ) : The first autotrophic organisms were the chemoautotrophs that never released oxygen.

A

Both Assertion and reason are tru and reason is the correct explanation of Assertion

B

Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion

C

Assertion is true, but Reason is false

D

Assertion is false, but Reason is true

Text Solution

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The correct Answer is:
B
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Following are the statements regarding the origin of life (A) The earliest organisms that appeared on the earth were non-green and presumably anaerobes (B) The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of the following options is correct

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Following are the two statements regarding the origin of life (a) the earliest organisms that appeared on the earth were nongreen and presumably anaerobic The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of following options is correct

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ARIHANT NEET-ORIGIN OF LIFE-Chapter Exercises Medical entrance Gallery (C) (Collection of questions Asked in NEET & Various Medical Entrance Exams)
  1. In miller's experiment the following was not part of the starting chem...

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  2. Which was the first catalytic molecule during evolution of life?

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  3. Which compounds were used by Miller in his experiment for obtaining am...

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  4. Who first conducted experiment on evolution to prove biochemical origi...

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  5. Abiogenesis means

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  6. Origin of life as a result of chemical evolution has been properly exp...

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  7. Coacervates belongs to the category of :

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  8. Who proposed that the first form of life could have come from pre-exis...

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  9. Which was absent in the atmosphere at the time of origin of life ?

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  10. In the early earth, organic acids were produced by the combination of ...

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  11. The results of Miller's experiments were discussed in the book ' The p...

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  12. Miller conducted his experiment in an apparatus containing methane, am...

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  13. Which of the following was formed in Stanley Miller's experiment?

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  14. Which one of the following incorrect about the characteristic of prot...

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  15. According to Oparin, which one of the following was not present in the...

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  16. Which one of the following amino-acids was not found to be synthesized...

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  17. Assertion: Coacervates are believed to be the precursors of life. ltbe...

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  18. Assertion (A) : The earliest organisms that appeared on the Earth were...

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  19. Which compound has very important role in prebiotic evolution?

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  20. The concept of chemical evolution is based on :

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