Answer: The early Earth had no ozone layer and was probably very hot. The early Earth also had no free oxygen. Without an oxygen atmosphere very few things could live on Earth. Anaerobic bacteria were probably the first living things on Earth.
Literally all I have is humor
Answer:
1. Scientific method
2. pseudopods
3. In 1909, Ernest Rutherford’s
4. innovation
5. nerve cell
B
Explanation:
