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Which one is present today but was absen...

Which one is present today but was absent about 3 to 5 million years ago ?

A

`N_(2)`

B

`O_(2)`

C

`H_(2)`

D

`CH_(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
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GRB PUBLICATION-ORIGIN OF LIFE-OPARIN-HALDANE THEORY
  1. Chemical theory of origin of life was given by:

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

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  3. Which one is present today but was absent about 3 to 5 million years ...

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

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  5. Which of the following is a true statement?

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

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

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

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  9. Life originted in :

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

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  11. Life originted in the era:

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

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

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

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

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

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  17. The primitive Earth condition were experimentally shown by :

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  18. Stanley Miller proposed origin of life by :

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

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

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