ZOO EXAM 3

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shockwave
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46477
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ZOO EXAM 3
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2010-11-01 13:59:34
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ZOO EXAM
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ZOO EXAM 3
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  1. T OR F?
    DO ANNELIDA HAVE A TRUE COELOM?
    TRUE.
  2. THIS PHYLUM HAS Specialization of head region into differentiated organs such as tentacles, eyespots, palps (sensory functions)
    ANNELIDA
  3. THIS PHYLUM HAS A Centralization of nervous system as cerebral ganglia = brain
    • ANNELIDA
  4. WHAT TYPE OF CIRCULATION SYSTEM DOES THE ANNELIDA HAVE?
    • CLOSED.
  5. WHATARE PARAPODIA AND WHAT DO THEY DO?
    • Parapodia = side feet with bristles
    • Protective and aid in burrowing
    • Respiratory and locomotor functions
    • Found in Polychaetes = marine worms
    • Beginnings of paired appendages in higher forms.
  6. WHAT IS A NEPHRIDIA AND ITS FUNCTION?
    • Nephridia: 1 pair per segment
    • Remove waste from blood and coelom; a double transport system.
  7. T OR F ?
    ANNELIDA ARE THE HIGHEST FORM ABLE TO COMPLETE REGENERATION.
    TRUE.
  8. T OR F?
    All have parapodia not all have setae.
    TRUE
  9. IS THE CUTICLE OF A ANNELIDA SECRETED BY THE EPIDERMIS?
    YES.
  10. WHAT IS THE PROSTOMIUM AND HOW IS IT FORMED?
    IT'S THE HEAD AND FORMED WHEN THE ANTERIOR SEGMENTS FUSE.
  11. METAMERES OF ANNELIDA ARE SEPERATED BY WHAT?
    Separated by septa (where peritoneum of adjacent segments meet)
  12. T OR F?
    Each segment OF A EARTHWORM typically contains circulatory, respiratory, nervous, and excretory structures as well as a coelom.
    TRUE
  13. THE PERITONEUM. WHAT ARE THEY?
    ADJACENT SEGMENTS OF ANNELIDA ARE JOINTED AT THEM. ITS BASICALLY THE ENDS OF THE METAMERES.
  14. HOW DO EARTHWORMS CRAWL?
    crawling motions are produced by alternating waves of contraction by longitudinal and circular muscles passing down the body.
  15. AT WHAT END TO NEW SEGMENTS FORM ON AN EARTHWORM?
    Posterior end – new segments form just ahead of the posterior segment so the oldest segments are just behind the head
  16. THE PRESENCE OF SEPTA ON AN EARTHWORM GIVE IT THE ABALITY TO DO WHAT???
    WIDEN AND ELONGATE IN RESTRICTED AREAS.
  17. T OR F?
    EARTHWORMS HAVE A HYDROSTATIC SKELETON?
    • TRUE.
    • THEY THAT A FLUID FILLED COELOM.
  18. WHAT IS THE CLITELLUM AND WHO HAS IT?
    Clitellum: (kli-tellum): reproductive structure; a ring of secretory cells in the epidermis that appears on the worm’s exterior as a fat band around the body.
  19. T OR F ?
    THE CLASS POLYCHAETA DOES NOT HAVE CLITELLUM.
    TRUE
  20. T OR F?
    Polychaetes have no permanent sex organs, and usually have separate sexes.
    TRUE
  21. HOW TO POLYCHAETES REPRODUCE?
    Gonads appear during the breeding season as temporary swellings of the peritoneum and shed their gametes into the coelom.

    Fertilization is external and the early larva is a trochophore.

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