Question

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. (i) is correct but (ii) is false
• B. (ii) is correct but (i) is false
• C. Both (i) and (ii) are correct
• D. Both (i) and (ii) are false

Answer 1

The correct option is C Both (i) and (ii) are correct

According to the origin of life the first originated organism on earth were the prokaryotic heterotrophs, which were non-green and they were anaerobes as oxygen was not available on earth at that time. So, the first autotrophic organisms were dependent on chemicals and were known as chemoautotrophs.