<span>scientific consensus changed as scientists learned more about organisms. I think thats the answer.
</span>
<span>Buffers.
Buffers are chemicals that maintain pH at a very specific range. This is because buffers have an equilibrium that they will maintain that is very stable. If there are too many hydrogen ions (acidic), then buffers will sweep them up and hold onto them. If there are not enough ions in the matrix (basic) then the buffers will release the hydrogen ions and maintain a stable pH.</span>
your answers are b., travel, & E., loosely packed soil
Boiling point. If you boil water it changes from a liquid to a gas, which is a physical change. The rest are chemical properties because the chemical make up of an object changes.
Answer:
Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects
