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Which of the following is a true stateme...

Which of the following is a true statement?

A

The primitive atomsphere had 20% oxygen just like it is today.

B

the reducing primitive atomsphere contributed to the origen of klife and the oxidizing one today would hinder it.

C

The primitive atomsphere was an oxidizing one and today's is a reducing one, making photosynthesis possible.

D

It took so long for prokaryote evlution brcause the primitive atomsphere screened out the ultraviolet radiationfrom the sun.

Text Solution

Verified by Experts

The correct Answer is:
B
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GRB PUBLICATION-ORIGIN OF LIFE-OPARIN-HALDANE THEORY
  1. Which one is present today but was absent about 3 to 5 million years ...

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  2. The basic components of atomsphere of primitive Earth were:

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  3. Which of the following is a true statement?

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  4. Which of the following is a major source of oxygen today?

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  5. Which of the following has replaced methane of the primitive atomspher...

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  6. For origin of life, the most important condition is the presence of :

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  7. Life originted in :

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  8. There is no life in moon due to the absence of :

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  9. Life originted in the era:

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  10. There water of primitive ocean during the time of origin of life has b...

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  11. Which English scientist worked on origin of life and finally settled i...

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  12. Which of the following led J.B.S. Haldane to move to India in 1957?

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  13. One of the possible ear,ly sources of energy was/were:

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  14. Which compound had a very important role in prebiotic evolution?

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  15. The primitive Earth condition were experimentally shown by :

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  16. Stanley Miller proposed origin of life by :

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  17. The first experiment on chemical evolution and origin of life was carr...

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  18. The spark-discharge apparatus to test chemical evolution of life was d...

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  19. The diagram represents Miller's experiment. Choose the correct combina...

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  20. Finding of miller's experiment on origin of life has provided evidence...

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