Microbial Community Structure and Dynamics Quiz
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Questions and Answers

What can define the community structure of an organism?

  • Physical size of organisms
  • Temperature tolerance
  • Functional types (correct)
  • Geographical distribution
  • What is the 16S rRNA gene used for?

  • Identifying poorly described strains (correct)
  • Identifying plant species
  • Identifying geological formations
  • Identifying weather patterns
  • What does molecular phylogeny enable the classification of organisms according to?

  • Habitat temperature
  • Evolutionary relatedness (correct)
  • Morphological similarities
  • Geographical distribution
  • What did the study of rRNA lead to the definition of?

    <p>Three separate 'Domains' of life</p> Signup and view all the answers

    What is the 16S ribosomal ribonucleic acid (rRNA) a constituent of?

    <p>The small subunit (SSU) of prokaryotic ribosomes</p> Signup and view all the answers

    Which type of marine bacteria are usually adapted to growth in nutrient-rich environments?

    <p>Gammaproteobacteria</p> Signup and view all the answers

    Which marine bacteria are known to occur in a broad variety of marine environments such as plankton, sediments, sea ice, and animal surfaces?

    <p>The Roseobacter Clade of Marine Alphaproteobacteria</p> Signup and view all the answers

    What is a challenge in providing a culturing media suitable for all microorganisms sampled from a heterogeneous environment?

    <p>Unclear fundamental needs of marine bacteria</p> Signup and view all the answers

    What type of marine bacteria are usually able to achieve high cell density in cultures?

    <p>The Roseobacter Clade of Marine Alphaproteobacteria</p> Signup and view all the answers

    Why is marine broth unable to grow oligotrophic cells adapted to nutrient-poor environments?

    <p>It lacks essential nutrients for oligotrophic cells</p> Signup and view all the answers

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