Microbial Classification and Identification: Three Domains of Life
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Questions and Answers

What distinguishes Eukarya from Bacteria and Archaea?

  • Absence of ribosomal RNA
  • Single-celled structure
  • Presence of a nucleoid
  • Presence of a nucleus (correct)
  • How do Archaea differ from Bacteria despite their similar appearance?

  • Presence of a nucleus
  • Different metabolic processes
  • Lack of cell walls
  • Different genes for managing and reading out their DNA (correct)
  • What classification system was used before the introduction of the three domain system?

  • Phyla
  • Kingdoms (correct)
  • Families
  • Orders
  • What is taxonomy primarily concerned with?

    <p>Naming, describing, and classifying organisms</p> Signup and view all the answers

    Which component of taxonomy involves determining the distinguishing characteristics of taxonomic groups?

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

    What is the primary basis for plant and animal classification in phenetic classification?

    <p>Morphological, physiological, and ecological characteristics</p> Signup and view all the answers

    Why is morphology considered somewhat useful for prokaryotes in classification?

    <p>It is easy to study and includes characteristics like shape and size</p> Signup and view all the answers

    What is a phenotype based on in organisms?

    <p>Interaction of genotypes with the environment</p> Signup and view all the answers

    What does cladistics focus on in classifying organisms into groups (clades)?

    <p>Morphological characteristics reflecting evolutionary relationships</p> Signup and view all the answers

    Why is the assessment of genetic exchange not useful for classifying prokaryotes?

    <p>Prokaryotes lack sexual reproduction</p> Signup and view all the answers

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