Nematodes: Free-Living and Parasitic Roundworms
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Questions and Answers

What is the cause of soil-transmitted helminthiases?

  • Parasitic nematodes (correct)
  • Tardigrades
  • Flatworms
  • Free-living nematodes

    • What distinguishes nematodes from flatworms?

  • Taxonomic classification
  • Moulting behavior
  • Tubular digestive system (correct)
  • Presence of Hox genes

    • In which clade are nematodes taxonomically classified?

  • Ecdysozoa (correct)
  • Protostomia
  • Deuterostomia
  • Arthropoda

    • What is the estimated number of nematode species according to a 2013 survey?

    <p>Over 25,000</p> Signup and view all the answers

    Which phylum has kept the ancestral protostome Hox genotype?

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

    What is the phylum of nematodes?

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

    What do most nematode species feed on?

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

    What is the estimated number of nematode species according to a widely referenced article published in 1993?

    <p>over 1 million species</p> Signup and view all the answers

    What is the estimated number of nematode species according to a 2013 survey published in Zootaxa?

    <p>over 25,000</p> Signup and view all the answers

    What is the cause of uncertainty in estimating the total number of extant nematode species?

    <p>difficulty in distinguishing nematode species</p> Signup and view all the answers

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