The complex organic compounds that may have first evolved in the direction of origin of life on earth,may have been

  • A
    Proteins and amino acids
  • B
    Proteins and nucleic acids
  • C
    Urea and nucleic acids
  • D
    Urea and amino acids

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Give a scientific reason: Among the various theories of the origin of life,the chemical evolution theory is the most widely accepted.

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In which era was there no presence of life?

The organism which appeared first on Earth is known as:

At the time of the origin of life on Earth,which of the following was absent?

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