Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings PowerPoint Lectures for Biology: Concepts and Connections, Fifth Edition – Campbell, Reece, Taylor, and Simon Lectures by Chris Romero Chapter 16 The Origin and Evolution of Microbial Life: Prokaryotes and Protists
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings 16.0 Ancient Bacteria Changed the World Photosynthetic - dominated Earth from 3 billion years ago to - created Earth's aerobic atmosphere from
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings EARLY EARTH AND THE ORIGIN OF LIFE 16.1 The universe began with a "big bang" between - Planet Earth formed - volcanic activity,
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings 16.2 How did life originate? - the first organisms approx. - experiments showed that organic molecules could have
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings 16.3 In 1953, Stanley Miller and Harold Urey – used a mixture of inorganic molecules ( ) – created a laboratory environment that simulated - within days, some of the 20 ________________ that are found in organisms today were
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings PROKARYOTES 16.4 Prokaryotes have inhabited Earth for - survive in environments too
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings 16.5 Prokaryotes have an immense – cause serious – have beneficial relationships with – are essential in the
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings 16.6 Prokaryotes come in a variety of – Spheres ( – Rods ( – Curves or spirals (
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings 16.7 Prokaryotic cells are ______________ than eukaryotic cells in both ______________ and ______________________ of genome - about one-thousandth as much DNA as
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings 16.8 Prokaryote Nutrition – Autotrophs make their own from – Heterotrophs obtain their from
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings CONNECTION 16.9 Some prokaryotes cause - Pathogenic bacteria cause about half of - mostly by - secreted by - produce some of the most
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings CONNECTION Bacteria have been used as biological weapons throughout - ___________________ in the Middle Ages - _________________ in the U.S.A. in The Biological Weapons Convention - signed by - but is not always
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings CONNECTION Prokaryotes help recycle chemicals and clean up – release O 2 into – decompose organic wastes and
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings PROTISTS The eukaryotic cell probably originated as a Symbiosis: a close association between Eukaryotic cells evolved from prokaryotic cells more than
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Protists - mostly - found almost anywhere Video: Vorticella Habitat Video: Vorticella Habitat
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Diatoms - photosynthetic, - glassy cell wall - contain Amoebas - move and feed by means of
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Red algae and green algae - closest relatives of Green algae - named for
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Multi-cellularity evolved in -specialized cells perform - are dependent on - specialization may have led to distinctions between