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JIPMER 2017
Exam
JIPMER
Year
2017
Subject
Zoology
Chapter
Evolution

JIPMER 2017 · Zoology · Evolution

Following are the two statements regarding the origin of life. I....

Following are the two statements regarding the origin of life. I. The earliest organisms that appeared on the earth were non-green and presumably an aerobes. II. The first autotrophic organisms were the chemoautotrophs that never released oxygen of the above statements which on of the following options is correct?

Options

  1. AII is correct, but I is false
  2. BBoth I and II are correct
  3. CBoth I and II are false
  4. DI is correct, but II is false

Correct answer

A. II is correct, but I is false

Step-by-step solution

The earliest organisms that appeared on earth were anaerobic chemoautotrophs. Chemoautotrophs were the first autotrophic organisms. They were unable to perform photolysis of water and never released oxygen, e.g. sulphur bacteria.
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