Because Precambrian rocks are in short supply, hence fossil evidence is harder to find.they only discovers sections of some Precambrian rocks there were no bones or shells to be permineralized.
Positive feedback is a control system that sends a signal to ( increase) a response.
Answer:
They are microorganisms that are important in the nitrogen cycle as converters of soil ammonia to nitrates, compounds usable by plants.
Explanation:
If they both disagree with each other than they will both work harder on trying to figure out the real answer. Or they will find something important that they didn't plan on finding and now we have the cure for cancer
