Bacteria Webquest



Name:____________________________________________________________ Date:__________________________ Bacteria Webquest – Learn Your GermsINTRODUCTION: Think Bacteria and Viruses are the same?Website #1: the following table comparing viruses and bacteria:CharacteristicBacteriaVirusNucleus?How do they reproduce?Can it cause disease?What is its structure?Living or non-living?Size?Beneficial?Can it be treated?Website 2: (Use the Relative Size and Detection Chart at the top of the page!)Can bacteria or viruses be seen with the naked eye?Can bacteria be viewed with a light microscope?Which kind of microscope is needed to view virus? Why?Bacteria BasicsWebsite 3: Bacteria Shapes: sketch and describe these bacteria shapesCocciBacilliSpirillaDescribe how bacteria reproduce.Archae (aka Archaebacteria)When these microscopic organisms were first discovered (in 1977), they were considered?bacteria. However, when their?ribosomal RNA?was sequenced, it became obvious that they bore no close relationship to the bacteria and were, in fact, more closely related to the?eukaryotes?(including ourselves!) For a time they were referred to as archaebacteria, but now to emphasize their distinctness, we call them Archaea. They have also been called?Extremophiles?in recognition of the extreme environments in which they have been foundWebsite 4: When did scientists realize that archae are different from bacteria?Which of the two kingdoms of bacteria are more similar to humans?Types of Archae: read this section and complete the chart below. Place check marks in the appropriate boxes.MethanogensHalophileThermoacidophilePrefers high salt conditionsPrefers high temperaturesPrefers acidic environmentslives in swamps, marshes, cattle rumen and OUR intestineslives in the Great Salt Lake and The Dead Sealive in the hot springs of Yellowstone National Park and in the undersea ventsBacteria StructureWebsite 6: Label the parts of the bacterium: flagella, pilli, nucleoid(DNA), ribosomes, cell membrane, cell wall, capsule26782171016000-14681207366000-285242014922500-41205153619500-285242015113000-4120515190500-285242015113000-412051515113000-35941009779000-23260057620000-383540015748000-25673056032500-6064252413000Genetic Recombination Genetic:Website 7: the video and listen (with headphones). During conjugation, what is transferred from one bacteria to the next?What is the role of the pilus in this process?What is the purpose of conjugation?Website 8: down to the TRANSDUCTION section.How is transduction different from conjugation? (I.e. what is involved with the genetic exchange?)Using the Table 7.6 at the top of the page, what is the source of the DNA (Requirements) in the process of transduction?Bacteria Metabolism:Website 9: 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?Website 10: do certain bacteria become endospores?4619625231775What kinds of conditions can they survive? ................
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