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Bacteria Webquest Name: ___________________________ Objective: This is to introduce you to the world of bacteria! Go to the websites and answer the following questions in RED font only. When finished, send this file to the homework folder. Please visit the following website(s): http://www.microbeworld.org/ http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookmito.html#Prokaryotic%20Cell%20Division http://www.britannica.com/EBchecked/topic/65525/binary-fission (watch the animation - you’ll need sound!) 1. 2. 3. 4. 5. 6. 7. 8. What is a bacteria? What is a prokaryote? How are bacteria classified? What are the three main shapes of bacterial cells? How small are bacteria? How do bacteria reproduce, describe the process. How can one slow the reproductive process of bacteria? Why are bacteria considered ubiquitous? (you might have to look up what ubiquitous means!) Please visit the following website: http://www.microbeworld.org/ 9. How does each of the following make their energy (what type of feeder are they)? A) Methanogens – B) Halophiles – C) Thermophiles – D) Psychrophiles – 10. How are Archae bacteria different than Eubacteria? 11. How long ago did Bacteria and Archaebacteria diverge from a common ancestor? Please visit the following website: http://www.cellsalive.com/cells/bactcell.htm Label the parts of the bacterium: flagella, pilli, nucleoid(DNA), ribosomes, cell membrane, cell wall, capsule Please visit the following website: http://www.csun.edu/~csunmore/Prokaryotes.html Using the Venn Diagram below, list at least 2 features unique to Prokaryotes, 2 features unique to Eukaryotes and 2 features that they both share. Please visit the following website: http://www.ucmp.berkeley.edu/bacteria/bacterialh.html 12. 13. 14. 15. 16. 17. 18. What are pathogenic bacteria? What do aerobic bacteria require? Where do anaerobic bacteria live and what can they cause? How do facultative anaerobic bacteria differ from the other two? What is decomposition and how do bacteria play a role in the environment? What is nitrogen fixation and why are bacteria crucial to this cycle of life? What is denitrifying bacteria and why are they harmful to crops? Please visit the following websites: http://www.cellsalive.com/pen.htm http://whyfiles.org/038badbugs/mechanism.html http://www.microbiologybytes.com/video/endospores.html 19. What is penicillin? How does it work? 20. What is a plasmid? How does this allow for antibiotic resistance? 21. How can some strains of bacteria, like anthrax, survive harsh, unfavorable conditions? Please visit the following website: http://www.uphs.upenn.edu/bugdrug/antibiotic_manual/Gram1.htm 22. What is a gram stain? 23. What’s the difference between a gram positive and a gram negative bacterial cell? Visit these website to answer the following as well as supplement previous questions: http://www.beyondbooks.com/lif72/2a.asp 24. What do the prefixes diplo-, strepto- and staphylo- relate to when dealing with bacteria?