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Slide 1
Slide 1

... Viruses have either a lysogenic or lytic replication cycle: ...
Quiz
Quiz

... a. It cannot reproduce on its own b. It does not metabolize food for energy c. They cannot live without other species d. All of the above ...
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Biol 1406 notes Ch 19 8thed

... ○ The sap from one generation of infected plants could be used to infect a second generation of plants that could infect subsequent generations.  Beijerinck also determined that the pathogen could reproduce only within the host, could not be cultivated on nutrient media, and was not inactivated by ...
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... 1. Which of the following statements are true about protists? Circle all that are true. Rewrite the false ones to make them true. a. Protist have an organized nucleus. b. Protist are always multicellular. c. Most protist live in water. d. Protist are sometimes single celled. e. Protist are decompose ...
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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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