BIOS 242 Microbiology Midterm Exam Study Guide Latest Version.

Microbiology Midterm Study Guide Use these key concepts to guide your studies, but keep in mind that everything in the chapters we have covered so far is fair game for your midterm exam. Week 1 (Chapters 1, 3, 11) • Be able to list and describe the contributions of the scientists discussed in the chapter o Antoni van Leeuwenhoek  Made the first microscope  Discovered the microscopic word • Noticed small animals, fungi, algae, and single protozoa when looking at water o Carolus Linnaeus developed a taxonomic system for naming plants and animals and group similar organisms together.  Bacteria  Archaea  Fungi * Leeuwenhoek did not see virus  Protozoa  Algae  Small multicellular animals o Redi’s experiment (no spontaneous generation)  His experiments demonstrated when decaying meat was kept isolated from flies maggots would never develop  When meat was exposed, maggots would appear  Many people say this a doubted Aristotle’s theory of spontaneous generation o Needham’s experiment(Spontaneous generation)  Boiled beef gravy and infused plat material in vials and tightly sealed with corks  Some days later he observed the vials were cloudy and examination revealed an abundance of microbial animals o Spallanzani’s Experiment  Boiled infusion for almost an hour and sealed by melting necks closed  Infusion remain clear, unless the seal was broken and air was let in • If air was let in infusion become cloudy  People argued that there was no air for organisms to thrive o Pasteur(no spontaneous generation)  Preformed experiments with swan-necked flasks and boiled infusion long enough to kill everything  The infusion allowed air to come in, but not micros  When the flask remained upright the dust would settle in the bend and the infusion remained clear.  If the flask was tilted then the dust would get in and the infusion would become cloudy