Biology 150 Exam 3

26 Questions | Total Attempts: 39

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Exam 3 - Sponges, Cnidarians, Rotifers, Annelids and Mollusca


Questions and Answers
  • 1. 
    Spicules are made up of:
    • A. 

      NaO2

    • B. 

      CaCO3

    • C. 

      C2CO

    • D. 

      CaC2

  • 2. 
    Hydra, unlike most Cnidarian, live in:
    • A. 

      Estuaries

    • B. 

      Fresh water

    • C. 

      Salt water

    • D. 

      Brackish water

  • 3. 
    Hydra reproduce:
    • A. 

      Sexually

    • B. 

      Asexually

  • 4. 
    Sponges habitat:
    • A. 

      Aquatic, parasitic and terrestrial

    • B. 

      Aquatic and terrestrial

    • C. 

      Aquatic

    • D. 

      Parasitic

  • 5. 
    The gelatinous material between the inner and outer epidermis in sponges:
    • A. 

      Pharynx

    • B. 

      Mesohyle

    • C. 

      Mesoglea

    • D. 

      Mid-epidermis

  • 6. 
    How do Annelidia sexually reproduce:
    • A. 

      Monecious and dioecious with internal fertilization

    • B. 

      Monecious and dioecious with external fertilization

    • C. 

      Monecious and dioecious

    • D. 

      Monecious with internal fertilization

  • 7. 
    Obelia and Gonionemus both have this(these) stage(s):
    • A. 

      Polyp

    • B. 

      Medusa

    • C. 

      Polyp and Medusa

    • D. 

      None of these

  • 8. 
    Which structure (in Cnidarians) releases a toxin to paralyze its prey:
    • A. 

      Choanocytes

    • B. 

      Pharynx

    • C. 

      Scolex

    • D. 

      Nematocysts

  • 9. 
    Porifera sexual reproduction is:
    • A. 

      Monecious

    • B. 

      Dioecious

    • C. 

      Monecious and Dioecious

    • D. 

      Sponges don't reproduce sexually

  • 10. 
    In sponges, the epidermis lines the:
    • A. 

      Incurrent canal, spongocoel and the outer surface

    • B. 

      Radial canal, spongocoel and the outer surface

    • C. 

      Incurrent canal, and the outer surface

    • D. 

      Spongocoel and the outer surface

  • 11. 
    Segments in Annelidia can function independently:
    • A. 

      True

    • B. 

      False

  • 12. 
    Collar cells in sponges:
    • A. 

      Digest food fragments and their flagella move to create water currents

    • B. 

      Digest food fragments

    • C. 

      Move flagella to create water surrents

    • D. 

      None of these

  • 13. 
    Ancestrally, Cnidarians are most closely related to:
    • A. 

      Fungi

    • B. 

      Protists

    • C. 

      Plants

    • D. 

      Algae

  • 14. 
    In Cnidarians, located between the epidermis and gastrodermis, is the:
    • A. 

      Mesohyle

    • B. 

      Mesoglea

    • C. 

      Pharynx

    • D. 

      Scolex

  • 15. 
    Vertical slit in the terminal segment of Annelidia:
    • A. 

      Mouth

    • B. 

      Anus

    • C. 

      Prostomium

    • D. 

      Mantle

  • 16. 
    Level of organization in sponges:
    • A. 

      Organ system

    • B. 

      Cell specialization

    • C. 

      Tissue

    • D. 

      Organ systems

  • 17. 
    In sponges, collar cells line:
    • A. 

      The epidermis

    • B. 

      The incurrent canal

    • C. 

      The pore

    • D. 

      The radial canal

  • 18. 
    Tiny bristlelike structures on the ventral structures of Annelidia:
    • A. 

      Nephridia

    • B. 

      Setae

    • C. 

      Scolex

    • D. 

      Ganglia

  • 19. 
    Which phylum uses a hydrostatic coelom for body support:
    • A. 

      Platyhelminthes

    • B. 

      Annelidia

    • C. 

      Cnidaria

    • D. 

      Porifera

  • 20. 
    In sponges, gemmules are:
    • A. 

      Released in favorable and unfavorable conditions

    • B. 

      Released in favorable conditions only

    • C. 

      Released in unfavorable conditions only

    • D. 

      Are not released at all

  • 21. 
    Annelidia habitat:
    • A. 

      Aquatic, terrestrial, and parasitic

    • B. 

      Aquatic and parasitic

    • C. 

      Aquatic and terrestrial

    • D. 

      Aquatic

  • 22. 
    How do Annelidia asexually reproduce:
    • A. 

      Budding

    • B. 

      None

    • C. 

      Fragmentation

    • D. 

      Transverse fission

  • 23. 
    Sponge support structure:
    • A. 

      Spongin

    • B. 

      Spongin and spicules

    • C. 

      Spicules

    • D. 

      Spicules and scolex

  • 24. 
    Both Scypha and Leucoselina have this body plan:
    • A. 

      Asconoid

    • B. 

      Syconoid

    • C. 

      Leuconoid

  • 25. 
    What phylum has a body organization including bilateral symmetry, a head, segmentation, a complete gut and a coelom:
    • A. 

      Rotifera

    • B. 

      Mollusca

    • C. 

      Platyhelminthes

    • D. 

      Annelidia

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