Quiz 5

Card Set Information

Quiz 5
2015-09-29 15:47:56
Porifera Cnidaria
Zoology Lab
characteristics of the Phylum Porifera and Cnidaria
Show Answers:

  1. The simplest group of true animals
  2. What grade of organization do sponges have and why?
    Cellular grade b/c no true tissues
  3. Choanocytes
    Cells of the sponge that take in nutrients by phagocytosis
  4. Osculum
    Opening of a sponge where water exits
  5. Ostia 
    Pores in the sponge where water enters into
  6. Spicules
    Skeletal elements of the sponge that support the body
  7. Sponge's symmetry 
    Asymmetrical or Radially symmetrical
  8. Sessile 
    Adult sponges are non-mobile
  9. What type of feeders are sponges?
    Suspension feeders
  10. What does it mean that cnidarians exhibit gastrulation?
    They have two embryonic germ layers and a gut
  11. Cnidocyte
    Cell type of cnidarians that produce stinging organelles
  12. Nematocyte
    Stinging organelles of Cnidarians
  13. Mesoglea
    Jelly-like substance that lies between the ectoderm and endoderm of the Cnidarian
  14. What symmetry do Cnidarians have?
    Radial Symmetry
  15. Gastrovascular Cavity (2)
    • Provides for digestive and vascular functions 
    • Single opening called the "mouth" which serves as both mouth & anus
  16. Hydra (3)
    • Solitary polyp
    • no medusa stage
    • freshwater
  17. Obelia (2)
    • Extensive polyp colony 
    • Small medusa
  18. Gonionemus (2)
    • Small solitary polyp
    • Well-developed medusa
  19. Physalia (2)
    • Portuguese man-of-war
    • Colonial and free-floating
  20. Class Scyphozoa
    True "jellies"- medusa stage dominates and the polyp stage is reduced
  21. Class Anthozoa
    Polyp stage dominates and medusa stage is absent