Which of the following is the correct sequence of events in the origin of life?
I: | Formation of protobionts. |
II: | Synthesis of organic monomers. |
III: | Synthesis of organic polymers. |
IV: | Formation of DNA-based genetic systems. |
1. | I, II, III, IV | 2. | I, III, II, IV |
3. | II, III, I, IV | 4. | II, III, IV, I |
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. |