Wi-10-Bacteria and Viruses (1)

Wi-10-Bacteria and Viruses (1) - Announcements Reading for...

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1 Announcements • Reading for this section – Ch 13, sections13.3-13.8 and 13.15-13.18 • Stay after class for book supplement Lecture 16 • Dr. Macagno’s lecture on the eye —what you should know •Bac te r ia – What they are, what they do, how to get rid of them
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2 Bacteria and Viruses What do we know about bacteria?
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3 What do we know about bacteria? • Prokaryotes • Reproduce by “binary fission” – FAST!!! • Most are harmless •S ize
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4 Bacterial structure • Single-cell • Genome : “Nucleiod”region contains DNA • May also contain plasmids • No organelles • Some can undergo photosynthesis • Separated by shape Bacteria are classified by shape http://porpax.bio.miami.edu/~cmallery/150/proceuc/c8.27x3.bact.shapes.jpg
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How are bacteria good? • Break down dead plants and animals • Help us digest food • Good bacteria can crowd out “bad” bacteria Pathogens: bad bacteria • Some bacteria produce toxins
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Wi-10-Bacteria and Viruses (1) - Announcements Reading for...

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