The reason why nost scientists thought that the first true cells formed on Earth were anaerobic is being shown in the second option :B. because there was no oxygen on early Earth. Paying attention to this fact scientists discovered that first cells were prokaryotes and greatest part of them created oxygen as a toxic by-product of their own metabolism which make them understand how the planet was provided with oxygen and made a conclusion that first cells were anaerobic.
Answer:
10x5x6 in this order=300
Explanation:
10x5 is 50
50x6 is 300 :) hope this helps
2, because a theory is not a law that can not be changed, and new evidence can change a theory.