Fossil Practical II - The Sponges

15 Questions | Total Attempts: 73

SettingsSettingsSettings
Please wait...
Fossil Practical II - The Sponges

.


Questions and Answers
  • 1. 
    Containing 6-ray silica spicules and forming beautiful glass skeletons of SiO2, the "glass" sponges are in what class of sponges?
    • A. 

      Calcarea

    • B. 

      Hexactinellida

    • C. 

      Demospongiae

    • D. 

      Sclerospongiae

  • 2. 
    Food particles caught on the choanocytes’ collars are dispersed to other cells by amoebocytes that move around freely in the sponge.
    • A. 

      True

    • B. 

      False

  • 3. 
    In the Ediacaran Period, most faunal assemblages possessed no hard parts.
    • A. 

      True

    • B. 

      False

  • 4. 
    Multi-celled organisms, likely with loose associations with single-celled Protists that form simple colonies for survival.
    • A. 

      Protozoans

    • B. 

      Metazoans

    • C. 

      Eukaryotic

    • D. 

      Prokaryotic

  • 5. 
    Some sponges do not have spicules.
    • A. 

      True

    • B. 

      False

  • 6. 
    The body of this class of sponge is composed of the protein “Spongin”, similar to hair/fingernail composition.
    • A. 

      Calcarea

    • B. 

      Demospongiae

    • C. 

      Sclerospongiae

    • D. 

      Hexactinellida

  • 7. 
    The flagella of the choanocytes causes a current that draws in water and food from the osculum and out the porocytes.
    • A. 

      True

    • B. 

      False

  • 8. 
    The fossil record shows the beginnings of multi-celled organisms during what period?
    • A. 

      Triassic

    • B. 

      Cambrian

    • C. 

      Hadean

    • D. 

      Ediacaran

  • 9. 
    The geologic range of sponges is Cambrian to Recent.
    • A. 

      True

    • B. 

      False

  • 10. 
    The inside of the sponge is called the _____ and is lined with a special ciliated, collared cells called _______.
    • A. 

      Spongocoel and choanocytes

    • B. 

      Choanocytes and spongocoel

    • C. 

      Porocytes and ostia

    • D. 

      Flagella and osculum

  • 11. 
    The outer cells of a sponge are “stuck” to the inner cells by a gel-like layer that serves as a biological “glue”.
    • A. 

      Spicules

    • B. 

      Mesozoic

    • C. 

      Mesoglea

    • D. 

      Mesopotamia

  • 12. 
    These complex, "coralline" sponges create stony skeletons of CaCO3, silica spicules, and spongin are in what class of sponges?
    • A. 

      Sclerospongiae

    • B. 

      Calcarea

    • C. 

      Demospongiae

    • D. 

      Hexactinellida

  • 13. 
    What is the life habit of sponges?
    • A. 

      Sessile benthic

    • B. 

      Demersal

    • C. 

      Vagrant benthic

    • D. 

      Epifaunal

  • 14. 
    What Phylum are sponges categorized as?
    • A. 

      Mollusca

    • B. 

      Cnidaria

    • C. 

      Animalia

    • D. 

      Porifera

  • 15. 
    Within the mesoglea are microscopic structures that appear as toy “jacks”, and serve to support the sponge.
Back to Top Back to top