Ch 27 - Bacteria and Archaea (1 slide per page)-1

2 campbell et al 9th ed 19 some bacteria have a

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Unformatted text preview: ped) Spirillum (spiral) Figure 27.2 (Campbell et al 9th ed) 19 Some bacteria have a sticky capsule around their cell wall e.g. Streptococcus • Stick to substrate, host, or other bacteria in colony • Protect against: • dehydration • host immune system Figure 27.4 (Campbell et al 9th ed) 20 Some bacteria and archaea stick to their host or each other with short hair-like fimbriae e.g. Neisseria gonorrhoeae, E. coli, Bordetella pertussis Figure 27.5 (Campbell et al 9th ed) 21 Some bacteria form endospores under harsh conditions e.g. Bacillus anthracis Bacteria: • copies chromosome & surrounds w/ multilayered structure • removes H2O from endospore • lyses, releasing endospore Endospore: • Dormant – i.e. no metabolism or reproduction Highly durable to heat & toxins • Can remain dormant for centuries Figure 27.9 (Campbell 9th ed) 23 Prokaryotic Reproduction Binary fission (No mitosis) - Asexual reproduction - As often as every 20 minutes! - Multiplication only Does not include genetic recombination (exchange of genetic material) 25 Prokaryotes have MUCH greater genetic diversity Gene...
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This note was uploaded on 02/12/2014 for the course BIOLOGY 2011 taught by Professor Woo during the Fall '10 term at University of Central Florida.

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