Animal Classification Quiz
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Questions and Answers

What is the main characteristic that distinguishes coelomates from acoelomates?

  • Presence of scattered mesodermal pouches
  • Presence of a notochord
  • Presence of segmented bodies
  • Presence of a body cavity lined with mesoderm (correct)
  • Which type of animal possesses a pseudocoelom?

  • Annelids
  • Aschelminthes (correct)
  • Molluscs
  • Platyhelminthes
  • What is the term for animals that display external and internal body segmentation?

  • Pseudocoelomates
  • Coelomates
  • Non-segmented animals
  • Metameric segmentation (correct)
  • Which group of animals is defined by the presence of a notochord during development?

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

    Which of the following is an example of an acoelomate?

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

    What defines a coelomate animal?

    <p>Body cavity lined by mesoderm</p> Signup and view all the answers

    Which of the following is NOT an example of a coelomate?

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

    Which type of body cavity characterizes pseudocoelomates?

    <p>Scattered pouches of mesoderm between ectoderm and endoderm</p> Signup and view all the answers

    What is the primary characteristic of acoelomates?

    <p>Absence of any body cavity</p> Signup and view all the answers

    Which animal is a classic example of segmentation observed in coelomates?

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

    What is the primary function of the water transport system in sponges?

    <p>For food gathering, respiratory exchange and waste removal</p> Signup and view all the answers

    Which statement about sponges is correct?

    <p>Sponges are hermaphroditic, possessing both eggs and sperms.</p> Signup and view all the answers

    What type of cells line the spongocoel and canals in sponges?

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

    What distinguishes the larval stage of sponges from the adult form?

    <p>It is morphologically distinct from the adult.</p> Signup and view all the answers

    What materials typically make up the skeleton of sponges?

    <p>Spicules or spongin fibers</p> Signup and view all the answers

    What unique structures do Cnidaria possess that allow them to capture prey?

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

    Which body form in Coelenterata is characterized as sessile and cylindrical?

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

    How do Cnidaria primarily reproduce in their polyp form?

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

    Which of the following is NOT a characteristic of Cnidaria?

    <p>Exclusively freshwater</p> Signup and view all the answers

    What is the role of the gastrovascular cavity in Cnidaria?

    <p>Digestion and circulation</p> Signup and view all the answers

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