The precambrian era makes up about 90% of the earths history, but there was little to no living organisms at the time other than microscopic ones. The first eukaryotes were found in the cambrian period after the precambrian period, not only that but at the end of the precambrian era in the Proterozoic era there was a mass extinction of about 70-80% of all living organisms
An atom that has gained or lost electrons is called an ion
Answer: believe the answer is C.
Hope this helps!
I believe it is Carbon Dioxide. When we take in Oxygen, we breathe out Carbon Dioxide.
