CHAPTER 26 Early Earth and the Origin of Life Time line: Introduction to the History of Life 1.Life on Earth originated between 3.5 and 4.0 billion years.
CHAPTER 8 VOCABULARY REVIEW QUIZ TODAY!!!. The remains or physical evidence of an organism preserved by geological processes.
CYANOBACTERIA (CHLOROXYBACTERIA) BLUE GREEN ALGAE OR BLUE GREEN BACTERIA Traditionally: 1.Order Chroococcales 2.Order Oscillatoriales 3.Order Nostocales.
