Biology: Taxonomic Classification
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Questions and Answers

What is the main reason behind the reclassification of Prokaryotae into Bacteria and Archaea?

  • Differences in RNA markers and biochemistry (correct)
  • Differences in gene expression
  • Differences in DNA sequencing
  • Differences in protein structure

    • What is the term for the grouping of organisms into 8 levels of classification based on similarities and differences?

  • Taxonomic hierarchy (correct)
  • Phylogenetic tree
  • Genomic sequencing
  • Evolutionary classification

    • Which of the following is NOT a characteristic of eukaryotes?

  • Have a cell wall
  • Are all unicellular (correct)
  • Contain a nucleus
  • Are single-celled organisms

    • What is the most specific level of classification in the taxonomic hierarchy?

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

    What is the term for the large group that includes all organisms without a nucleus?

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

    Why do classification systems continually evolve?

    <p>As new molecular evidence is generated</p> Signup and view all the answers

    What is the study of the evolutionary history of a group of organisms called?

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

    What is the binomial system used for in classification?

    <p>To assign a unique, internationally recognized name to a species</p> Signup and view all the answers

    What is the purpose of a phylogeny tree?

    <p>To display the evolutionary relationships between organisms</p> Signup and view all the answers

    What is the most closely related species to humans?

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

    What is the smallest group of organisms that share a common ancestor?

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

    What type of evidence is now used to classify organisms?

    <p>Observable features, embryonic development, fossil evidence, and molecular evidence</p> Signup and view all the answers

    What is the basis of molecular evidence in classification?

    <p>Analysis of similarities between DNA and proteins</p> Signup and view all the answers

    What can be used to determine how closely related species are?

    <p>Differences in DNA base sequences</p> Signup and view all the answers

    Which species are more closely related, and why?

    <p>Species A and B, because they have 5 differences</p> Signup and view all the answers

    What is the principle behind DNA sequencing analysis?

    <p>The more closely DNA sequences overlap, the more closely species are related</p> Signup and view all the answers

    What is the significance of DNA conservation in molecular evolution?

    <p>It enables the analysis of DNA sequences</p> Signup and view all the answers

    What is the relationship between DNA sequences and phylogeny?

    <p>The more closely DNA sequences overlap, the more closely related species are on the phylogeny tree</p> Signup and view all the answers

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