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When did Archaebacteria evolve?...

When did Archaebacteria evolve?

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**Step-by-Step Solution:** 1. **Understanding Earth's Age**: The Earth is estimated to be approximately 4.54 billion years old. This provides a context for the timeline of life on Earth. 2. **First Appearance of Life**: Life is believed to have first appeared on Earth around 3.5 billion years ago. This marks the beginning of biological existence on our planet. 3. **Origin of Prokaryotic Cells**: The earliest forms of life were prokaryotic cells, which are single-celled organisms that lack a nucleus. These cells are considered the first life forms on Earth. ...
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