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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:
• 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:
– i.e. no metabolism
Highly durable to heat & toxins
• Can remain dormant
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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