Documents History of Life on Earth Chapter 12. The Age of the Earth 4.5 billion years old 4.5 billion years...

Slide 1History of Life on Earth Chapter 12 Slide 2 The Age of the Earth 4.5 billion years old 4.5 billion years old –Radiometric dating –Radioactive isotopes break down…

Documents Kingdom Archaebacteria

Kingdom Archaebacteria Kingdom Archaebacteria Taxonomy Life Science Five Kingdom System 20 years ago, bacteria were all grouped in the same kingdom: Monera. With advances…