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
3. cell wall
The cell wall is a rigid supporting structure.
300cm per hour
5cm per minute
3 meters per hour
Answer:
the answer is always wear safety goggles