The pH scale ranges from 0 to 14
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.
I believe it would be the reptile kingdom!
Answer:
1. physical and chemical barriers
2.non-specific innate response
3. specific adaptive responses
Explanation: