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Class 12 NEET Biology Evolution Questions Part 2
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Question : 36
Total: 66
Following are the two statements regarding the origin of life :
(a) The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
(b) The first autotrophic organisms were the chemoautotrophs that never released oxygen.Of the above statements which one of the following options is correct ?
[NEET 2016 P1]
Both (a) and (b) are false
(a) is correct but (b) is false
(b) is correct but (a) is false
Both (a) and (b) are correct.
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Solution:
👈: Video Solution
First originated organism was prokaryote chemoheterotroph and oxygen was not available on earth at that time so it must be anaerobic too. Even the first autotroph was dependent on chemicals so oxygen is not released
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