Bio1331 Animals - Evolution - Major Diploblast Groups (Lecture Three)

16 Questions | Total Attempts: 45

SettingsSettingsSettings
Please wait...
Bio1331 Animals - Evolution - Major Diploblast Groups (Lecture Three)


Questions and Answers
  • 1. 
    What is the 'scientific' name for the sponges?
  • 2. 
    How many species of porifera are there?
    • A. 

      15,000+

    • B. 

      150+

    • C. 

      1,500+

    • D. 

      150,000+

  • 3. 
    Complete the following sentence.Porifera are characterised by aggregations of cells around a water canal system, extracellular matrix of collagen, glycoproteins and skeletal elements called _______. 
  • 4. 
    Which of the following do Porifera NOT have?You may tick more than one.
    • A. 

      Cell layers

    • B. 

      Organs

    • C. 

      Symmetry

    • D. 

      Nerves

    • E. 

      Muscles

    • F. 

      An osculum

    • G. 

      Choanocytes

    • H. 

      Spicules

    • I. 

      Water canal system

  • 5. 
    Complete the following sentence:In the blastula of the Glass Sponge, micromeres and macromeres merge to form a multinucleated '_________________'.
  • 6. 
    Name a clade of Cnidarian.
  • 7. 
    Complete the following sentence: All cnidarians are carnivores, using toxins in ________ to subdue prey.
  • 8. 
    The phospholipases in toxins cause paralysis.How do they do this?
    • A. 

      Interfering with neurotransmission

    • B. 

      Lysing cell membranes

    • C. 

      Damaging muscle cells

  • 9. 
    The cnidarian gut is a blind sac called the ____________________.
  • 10. 
    True or False?Cnidarians are diploblastic.
    • A. 

      True

    • B. 

      False

  • 11. 
    What is the 'scientific' name for corals?
  • 12. 
    Complete the following sentence:Anthozoan polyps form a skeleton by secreting a matrix of organic molecules on which they deposit _____________.
  • 13. 
    Name the symbiotic, unicellular, photosynthetic algae that anthozoans host in their tentacles.
  • 14. 
    What causes bleaching in corals?
    • A. 

      Stress-induced expulsion of zooxanthellae

    • B. 

      Gaining of zooxanthellae

    • C. 

      Over-production of calcium carbonate

    • D. 

      Under-production of calcium carbonate

Back to Top Back to top