Solutions Manual For Microbiology An Introduction 13e (Global Edition) By Gerard Tortora, Berdell Funke, Christine Case

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Solutions Manual For Microbiology An Introduction 13e (Global Edition) By Gerard Tortora, Berdell Funke, Christine Case-1. In a nomenclature system designed by Carolus Linnaeus (1735), each living org... anism is assigned two names. 2. The two names consist of a genus and a specific epithet, both of which are underlined or italicized. Types of Microorganisms (pp. 30–32) 3. Bacteria are unicellular organisms. Because they have no nucleus, the cells are described as prokaryotic. 4. Most bacteria have a peptidoglycan cell wall; they divide by binary fission, and they may possess flagella. 5. Bacteria can use a wide range of chemicalsubstances for their nutrition. 6. Archaea consist of prokaryotic cells; they lack peptidoglycan in their cell walls. 7. Archaea include methanogens, extreme halophiles, and extreme thermophiles. 8. Fungi (mushrooms, molds, and yeasts) have eukaryotic cells (cells with a true nucleus). Most fungi are multicellular. 9. Fungi obtain nutrients by absorbing organic material from their environment. 10. Protozoa are unicellular eukaryotes. 11. Protozoa obtain nourishment by absorption or ingestion through specialized structures. 12. Algae are unicellular or multicellular eukaryotes that obtain nourishment by photosynthesis. 13. Algae produce oxygen and carbohydrates that are used by other organisms. 14. Viruses are noncellular entities that are parasites of cells. 15. Viruses consist of a nucleic acid core (DNA or RNA) surrounded by a protein coat. An envelope may surround the coat. 16. The principal groups of multicellular animal parasites are flatworms and roundworms, collectively called helminths. 17. The microscopic stages in the life cycle of helminths are identified by traditional microbiological procedures. Classification of Microorganisms (p. 32) 18. All organisms are classified into one of three domains: Bacteria, Archaea, and Eukarya. Eukarya include protists, fungi, plants, and animals. A Brief History of Microbiology (pp. 32–40) ASM 7.4: Ability to understand the relationship between science and society The First Observations (pp. 32–33) 1. Hooke’s observations laid the groundwork for development of the cell theory, the concept that all living things are composed of cells. 2. Anton van Leeuwenhoek, using a simple microscope, was the first to observe microorganisms (1673). The Debate over Spontaneous Generation (pp. 33–35) 3. Until the mid-1880s, many people believed in spontaneous generation, the idea that living organisms could arise from nonliving matter. 4. Francesco Redi demonstrated that maggots appear on decaying meat only when flies are able to lay eggs on the meat (1668). 5. John Needham claimed that microorganisms could arise spontaneously from heated nutrient broth (1745). 6. Lazzaro Spallanzani repeated Needham’s experiments and suggested that Needham’s results were due to microorganisms in the air entering his broth (1765). 7. Rudolf Virchow introduced the concept of biogenesis: living cells can arise only from preexisting cells (1858). 8. Louis Pasteur demonstrated that microorganisms are in the air everywhere and offered proof of biogenesis (1861). 9. Pasteur’s discoveries led to the development of aseptic techniques used in laboratory and medical procedures to prevent contamination by microorganisms. The First Golden Age of Microbiology (pp. 35–37) 10. The science of microbiology advanced rapidly between 1857 and 1914. 11. Pasteur found that yeast ferment sugars to alcohol and that bacteria can oxidize the alcohol to acetic acid. 12. A heating process called pasteurization is used to kill bacteria in some alcoholic beverages and milk. 13. Agostino Bassi (1835) and Pasteur (1865) showed a causal relationship between microorganisms and disease. 14. Joseph Lister introduced the use of a disinfectant to clean surgical wounds in order to control infections in humans (1860s). 15. Robert Koch proved that microorganisms cause disease. He used a sequence of procedures, now called Koch’s postulates (1876), that are used today to prove that a particular microorganism causes a particular disease. 16. In 1798, Edward Jenner demonstrated that inoculation with cowpox material provides humans with immunity to smallpox. 17. About 1880, Pasteur discovered that avirulent bacteria could be used as a vaccine for fowl cholera; he coined the word vaccine. 18. Modern vaccines are prepared from living avirulent microorganisms or killed pathogens, from isolated components of pathogens, and by recombinant DNA techniques. The Second Golden Age of Microbiology (pp. 37–40) 19. The Second Golden Age began with the discovery of penicillin’s effectiveness against infections. 20. Two types of chemotherapeutic agents are synthetic drugs (chemically prepared in the laboratory) and antibiotics (substances produced naturally by bacteria and fungi to inhibit the growth of other microorganisms). [Show More]

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