Download - Which Cells Do and Do Not Have Walls?
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(1.)
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• All Prokaryotes >Achaea and
Bacteria
• Some Protists
• Plants
• Fungi
• Animals
• Most Protists
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Under the MicroscopeUnder the MicroscopeUnder the MicroscopeUnder the Microscope
Cell wall
(6.)
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Cell wall purposesCell wall purposesCell wall purposesCell wall purposes
ProtectionStrengthShape maintenanceRegulation:
Prevents lysis (bursting)
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PlasmodesmataPlasmodesmataPlasmodesmataPlasmodesmata
Narrow channels transport:
WaterNutrients
Director of plant growth and development
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Cell Wall StructureCell Wall Structure
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Archaea
Polysaccharides
Proteins
Inorganic
Compounds?
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Bacteria!Bacteria!•Peptidoglycan
Gram-positive vs. Gram-negative
(2.)
(2.)
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CelluloseCellulose
>Protists and Plants<
•Primary Wall•Middle Lamella•Secondary Wall
PLANT CELLS
PLANT CELLS
(3.)
(4.)
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• CHITIN
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How do cell walls help us?How do cell walls help us?How do cell walls help us?How do cell walls help us?
Paper WoodFiberEnergyShelter
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References
1. “Carcassonne castle, France.” Wayfaring Travel Guide. <http://www.wayfaring.info/category/countries/france/page/4/> (accessed
12 March, 2010).2. “Doughnut Varieties.” Krispy Kreme Doughnuts and Coffee.
<http://www.krispykreme.com/varieties.html#> (accessed 13 March, 2010).
3. “Chemistry Review.” Nutrition Resources. <http://nutrition.jbpub.com/resources/chemistryreview9.cfm> (accessed
15 March, 2010).4. “22.5 The Dynamic Plant Cell Wall.” Molecular Cell Biology.
<http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=mcb&part=A6590> (accessed 15 March 2010).
5. "Plasmodesmata." What is a Virus?. Web. 23 Mar 2010. <http://www.mcb.uct.ac.za/tutorial/mcb3011s/MCB3011S%20Virology.htm>.
6. "cell wall." Bhs-66800. Web. 15 Mar 2010. <http://www.freewebs.com/bhs- 66800/cellwallandmembrane.htm>.
7. Hannahs, Greg. "Plasmodesmata." Hannahs Inc., 1997. Web. 15 Mar 2010. <http://biology.kenyon.edu/edwards/project/greg/pd.htm>.
8. Saupe, Dr. Stephen. "Plant Physiology." Cell Walls-Structure and Function. SG Saupe, 06 Feb 2009. Web. 23 Mar 2010. <http://employees.csbsju.edu/SSAUPE/biol327/Lecture/cell-wall.htm>.