BSC 2011 Biodiversity Exam 2 ch. 27-30 summary

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CH 27 .
: Bacteria & Archea
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provaryotes
- structural & functional adaptation contribute to their success
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mostly Unicellula
smaller than Eukaryotes
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variaty of shapes CoSpherical ,
Rod-Shape , Spiral 2)
↓
&
"Coli" "bacilli"

Cell wall snape/protection
bursting prevention (in hypotonic eur) In hypetonic Cell shrinks & reproduction
&




f
I
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↳ = from
evkaryotes (made of cellulose/Chitin) instead peptidoglycan (bacterial & polysachariddes proteins (Archacal)
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: =

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Gram stain: 6-O- simple walks of peptiglucan peniclin inhibts this -




6-00@ peptiglycan/move complex wl outer maharides toxis/ protected against body's defenses ->




↳ ① resistant to antibiotics

>
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Cupsule adherance to other things/protection agains delustration & immone system suield
surrounds cell wall >
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>
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Endosporesr developed under harsh conditions
· by multi-layer structure (dehyduated)
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>
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copy of its chromosome currounded


I
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Fimbriae (hair-like appendages) -
shorter & than pili (pull I cells together before DNA transfer)


MOTILITY :
Nagella (different from eularytic fayella) (shorter 8 compositive & propultion mecha .
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prob v capable of taxis (direct movement towards) away from stimulus
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.
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InternalOrganizationLDNAsimper than ekart s
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↳ less genome o 1 circular chrom . /several linear chrom .
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located in nucleid &/or plasmid vings
↳
① proteins
↳ NO nullev
↳
smaller vibosomes

* Rapid Repro ., mutation & yen recombination promote diversity .




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Reproduction fact :
in favorable enviro.
fission (vertical Gene trafer)
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↳ binary -o


short time
generation
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O generation time
>
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⑦ large population =
rapia evolution (mutations & yeu diversity
. fast)

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