Microbiology Study Guide - Chapter 1 Humans and the Microbial World Overview This chapter is an introduction to microbiology with a discussion of some

Microbiology Study Guide - Chapter 1 Humans and the...

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Chapter 1 Humans and the Microbial World Overview This chapter is an introduction to microbiology with a discussion of some of the major events that have been important in the development of the science. The origin and discovery of microorganisms is explored and the concept of two cell types, prokaryotic and eukaryotic, is introduced. The impact of microorganisms on humans is explored as well as the roles of these organisms in the biological world. The three domains are introduced and various kinds of microorganisms included in them are described. Binomial nomenclature is described, and viruses, obligate intracellular parasites not included in the three domains, are introduced. The chapter concludes with a discussion of microbial size. Learning Objectives After studying the material in this chapter, you should be able to: Define microbiology and describe its scope. Microbiology is the study of microorganisms Define microorganism. Microorganisms are the foundation of all life on earth Describe the environmental conditions under which the first microbes lived. The first microbes lived under... Explain why microorganisms have been successful. Microorganisms have been successful because... Describe the diversity of microorganisms. Briefly describe the contributions of the following people to the field of microbiology. Antony van Leeuwenhoek: Invented a magnifying glass (microscope) and studied lake water. Discovered single-celled organisms and called them “animalcules”. Known as the father of microbiology.
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Francesco Redi: He believed life did not arise spontaneously from non-living material, so he performed experiments and found that worms on rotting meat came from flies laying eggs on the meat. Took him about 200 years to disprove spontaneous generation of microorganisms. John Needham: Demonstrated boiled broth still produced microorganisms. Performed several experiments and found life can be created from no life.
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