'Organic molecules produced' presentation slideshows

The Origin and Evolutionary History of Life

The Origin and Evolutionary History of Life. Chapter 21. Learning Objective 1. What conditions do geologists think existed on early Earth?. Early Earth. The Origin of Life. Biologists generally agree life originated from nonliving matter by chemical evolution

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Chapter 17

285 views • 24 slides

The History of Life on Earth

The History of Life on Earth. An overview of current Scientific Theories. The Big Bang. Before our solar system existed, there was an enormous area of gas and dust. Scientists now tend to believe that our solar system was created by an explosion within that cloud of gas and dust.

363 views • 19 slides

HOW DID LIFE GET HERE?

Direct evidence :. Fossilised chains of bacteria-like cells found in Marble Bar W.A. Occur in rocks dated at 3500 M yr ago. HOW DID LIFE GET HERE?. Still being debated as possible these structures were produced by geological action NOT biological. First signs of life?.

172 views • 5 slides