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

  1. A
    (ii) is correct but (i) is false
  2. B
    Both (i) and (ii) are correct
  3. C
    Both (i) and (ii) are false
  4. D
    (i) is correct but (ii) is false

Solution & Step-by-step Explanation

The primitive atmosphere of earth was reducing (no free oxygen). Therefore, the first organisms were anaerobic chemoheterotrophs. Later, chemoautotrophs evolved, which used chemical energy but did not release oxygen.

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Following are the two statements regarding the origin of life:(i) The earliest organisms that appeared on the earth were non-green and presumably anaerobes.(ii) The first autotrophic organisms were the chemoautotrophs that never released oxygen.Of the above statements, which one of the following options is correct?
A
(ii) is correct but (i) is false
B
Both (i) and (ii) are correct
C
Both (i) and (ii) are false
D
(i) is correct but (ii) is false

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