Phylum Porifera Quiz
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Questions and Answers

What is the main reason why Porifera are referred to as sedentary animals?

  • They are always attached to a substratum (correct)
  • They lack the ability to reproduce
  • They have a spongy body structure
  • They feed on small organisms

    • What is the function of ostia and oscula in Porifera?

  • Excretion
  • Feeding
  • Reproduction
  • Respiration (correct)

    • Which special types of cells are found in Porifera that aid in feeding?

  • Calcium carbonate cells
  • Spongin fibres
  • Collar cells (correct)
  • Spicules

    • How do Porifera reproduce asexually?

    <p>By budding</p> Signup and view all the answers

    What are spicules in Porifera primarily made up of?

    <p>Calcium carbonate or silica</p> Signup and view all the answers

    Why do most Porifera exhibit an asymmetrical body shape?

    <p>As an adaptation to their sessile lifestyle</p> Signup and view all the answers

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