Question

When did the 1st bacteria appear on Earth?​

Answer 1

Answer:

3.5 billion years ago

Explanation:

Bacteria have existed from very early in the history of life on Earth. Bacteria fossils discovered in rocks date from at least the Devonian Period (419.2 million to 358.9 million years ago), and there are convincing arguments that bacteria have been present since early Precambrian time, about 3.5 billion years ago.

Answer 2

Answer:

2.7 billion years ago the first bacteria appear on Earth.