Answer:<em> The Miller-Urey experiment provided the first evidence that organic molecules needed for life could be formed from inorganic components. Some scientists support the RNA world hypothesis, which suggests that the first life was self-replicating RNA.</em>
Explanation:
Simple organic compounds might have come to early Earth on meteorites.
Answer:an organism who make its own food is autotrophic
Explanation:
According to the Big Bang theory, the universe was once very dense and is now expanding.
