Phylum Porifera

13 Questions | Total Attempts: 687

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Phylum Porifera

In this quiz, we’ll be taking a closer look at sponges, or perhaps more specifically known as phylum Porifera – a multicellular organism which has a body filled with pores and channels through which water circulates. What can you tell us?


Questions and Answers
  • 1. 
    A Phylum of porous, ________, _________ feeding animals. 
  • 2. 
    Those in phylum porifera are 
    • A. 

      Radially symmetrical

    • B. 

      Asymmetrical

    • C. 

      Bisymmetrical

    • D. 

      Inversely symmetrical

  • 3. 
    They have skeletons of ________ or ________ carbonate forming ________ or _______.
  • 4. 
    Porifera contain no tissue or organs
    • A. 

      True

    • B. 

      False

  • 5. 
    They possess three basic cell types: ____________, ____________, and _____________.
  • 6. 
    What is the first taxon that exhibits specialization of cell types? 
    • A. 

      Cnidaria

    • B. 

      Porifera

    • C. 

      Platyhelminthes

  • 7. 
    What are flattened cells that cover the outer surface of the sponge. 
    • A. 

      Archaeocytes

    • B. 

      Choanocytes

    • C. 

      Pinacocytes

  • 8. 
    Pinacocytes may be contractile and specialized into _________ which are tube like cells that _______ water flow through the sponge. 
  • 9. 
    Archaeocytes are specialized for: _______, _________ ________ ________, _________ _______, ________
  • 10. 
    Where are archaeocytes found? 
    • A. 

      Inner chambers or wall of the sponge

    • B. 

      Jelly like layer just below the pinacocytes

    • C. 

      The outer surface of the sponge

  • 11. 
    Where are choanocytes found?
    • A. 

      Inner chambers or wall of the sponge

    • B. 

      Jelly like layer just below the pinacocytes

    • C. 

      The outer surface of the sponge

  • 12. 
    Choanocytes are ________ cells with collar like ring of ________ connected by microfiliaments forming a net like mesh. 
  • 13. 
    ______ ________ are created by the flagella on the __________that draw microscopic food particles across their net.