PPT-Chapter 16 The Origin and Evolution of Microbial Life: Prokaryotes and Protists

0 PROKARYOTES 167 Prokaryotes have inhabited Earth for billions of years Prokaryotes are the oldest lifeforms And remain the most numerous and widespread organisms Colorized SEM 650 . Animal-Like Protists:. The Protozoa. Evolutionary Perspective of the Protists. The protists are a polyphyletic group that arose about 1.5 billion years ago when the Archaea and Eukarya diverged.. Our understanding of the evolutionary relationships among protists is currently in flux . THE ORIGIN AND EVOLUTION OF MICROBIAL LIFE. HOW DID LIFE ORIGINATE?. SPONTANEOUS GENERATION. LIFE ARISING FROM NON-LIVING MATTER. LONG BELIEVED AS THE ACCEPTED EXPLANATION OF ORIGINATION OF LIFE. EXPERIMENTS EVENTUALLY SHOWED IT TO BE IMPOSSIBLE. What Are Protists?. A group of one-celled organisms with well defined nuclei. All protists live in moist surroundings. Many protists possess both plant-like and animal-like features. Animal like protists are called PROTOZOAN . Microbiology. Microbial Growth. Microbial requirements for growth:. 1. . Physical. A. . Temperature. Optimal growth temperature. Permissible range. human pathogens optimal = . 37°C. Microbial Growth. Single-celled organisms. Very tiny. Cannot be seen without a microscope. Our microscopes are not powerful enough. Lack a nucleus and most other organelles. Most numerous organisms on Earth. Extremely important organisms.. P. . Lobosco. Monday November 8, 2010. There will be no grades given out until this Friday. Please do not ask!. HW-Read 11-1 and do the section review on page 273, questions 1-10 due Wed. Use spiral notebook.. “…sparked by just the right combination of physical events & chemical processes…”. Bacteria. Archae-. bacteria. Animalia. Fungi. Protista. Plantae. 4500. 4000. 3500. 3000. 2500. 2000. 500. Protists. Chapter 16. How Ancient Bacteria Changed the World. Mounds of rock found near the Bahamas. Contain photosynthetic prokaryotes. 0. Stromatolites in northern Canada . Figure 16.0Ax1. Fossilized mats 2.5 billion years old mark a time when photosynthetic prokaryotes . Study Material for. . . B.Sc. Part II. . Botany . Hons. .. . . Paper IV. . Dr. Pushpanjali Khare. Sr. . Federoff. Bacterial Diseases. Microorganisms—viruses and prokaryotes—that cause disease are called . pathogens. . Louis Pasteur helped to establish what has become known as the . germ theory of disease . Department of Anthropology, George Washington University, Washington DC, USA. 334 macropomaClupavus maroccanusSorbininardus apuliensis and Tischlingerichthys viohli(Diogo, 2007; see Fig. 1). This thus Microbial . BioDiversity. Dr. Rita Mahapatra. Assistant Professor. Neotech. College of applied Science and Research, . Virod. , Vadodara. Microbial biodiversity is defined as the variability among microorganisms. . FUNGi. Lesson 1. What are . Protists. ?. Protists. share characteristics with:. Plants. Animals. Fungi. But they don’t fit into any of those kingdoms!. A . protist. is a member of a group of eukaryotic organisms, which have a membrane-bound nucleus. functions of archaebacteria, monerans. (eubacteria), protists, fungi, plants, and animals. including humans. . Key concepts include:. how their structures and functions vary between and within the kingdoms;.