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Microorganisms Review Sheet
Microorganisms Review Sheet

... 23. What are the characteristics of fungi? (nutrition, movement, how many cells, etc.) 24. How do they reproduce? 25. When do fungi undergo sexual reproduction? Why? 26. How is mitosis in a fungus different from that of an animal or plant? 27. What are hyphae? 28. Where is the reproductive body of a ...
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History of virology



The history of virology – the scientific study of viruses and the infections they cause – began in the closing years of the 19th century. Although Louis Pasteur and Edward Jenner developed the first vaccines to protect against viral infections, they did not know that viruses existed. The first evidence of the existence of viruses came from experiments with filters that had pores small enough to retain bacteria. In 1892, Dmitry Ivanovsky used one of these filters to show that sap from a diseased tobacco plant remained infectious to healthy tobacco plants despite having been filtered. Martinus Beijerinck called the filtered, infectious substance a ""virus"" and this discovery is considered to be the beginning of virology. By the 20th century many viruses were discovered.
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