Conduction: I would explain why I think so, but I think the answer itself explains why well enough so that I don't exactly have anything to add
The lithosphere sits on top of the asthenosphere.
Answer:
RNA has great capability as a genetic molecule; it once had to carry on hereditary processes on its own. It now seems certain that RNA was the first molecule of heredity, so it evolved all the essential methods for storing and expressing genetic information before DNA came onto the scene.
Explanation:
oof
