The most important condition for the origin of life is the presence of

Who proposed that the first form of life could have come from pre-existing non-living organic molecules?

The theory of "continental drift" was originally proposed by

The origin of life took place in/on:

Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
Reason: The first autotrophic organisms were the chemoautotrophs that never released oxygen.

Provide definitions/explanations for the following terms: $1$. Evolution,$2$. Chemical evolution.