Lab 23

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Author:
cep9654
ID:
271763
Filename:
Lab 23
Updated:
2014-04-26 15:33:17
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Inverts part
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Final
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  1. This group is characterized by the presence of a unique __, and exoskeleton composed of chitin
    • Arthropoda
    • arthropodan membrane
  2. the fusing of segments to form functional units. These units are then called __
    • tagmentation
    • tagmata
  3. species only known from fossil record. they inhabited marine enviroments of the Cambrian and ordavician periods of the Paleozoic era
    Trilobita
  4. this group is noted for the presence of pre-oral pinchers
    Chelicerata
  5. horseshoe crabs
    Xiphosura
  6. spiders, ticks, mites, and scorpions
    arachnida
  7. The __ on arachnida serve as fangs which can inject toxins that will kill large animals
    chelicerae
  8. it is inherited and not learned
    innate behavior
  9. the mange in dogs is caused by the mite Demodex canis and lyme disease is spread by __
    ticks
  10. Crustacea have two pair of pre-oral antenae. The first pair is called the __, and the second is called the __.
    • antennule
    • antenna
  11. twice branched
    biramous
  12. Three sets of sensory and feeding appendages on crustacea which exist as modified mouth parts:
    • Mandibles
    • maxillae
    • maxillipeds
  13. Have legs with one branch. centipedes and millipedes
    Myriapoda
  14. All but the last segment has one pair of legs
    Chilopoda (centipedes)
  15. Al but the last segment has two pairs of legs
    Diplopoda (millipedes)
  16. Most mollusks have a rasping mouth organ called a __. This is used for __
    • radula
    • scraping food materials from surfaces
  17. snails, slugs, sea slugs, conchs
    gastropoda
  18. mussels, clams, oysters, scallops
    Bivalvia
  19. Nautilus, octopods, squid, cuttlefish
    Cephalopoda
  20. The exoskeleton is composed of of plates or __ that are formed from one calcite crystal
    ossicles
  21. radial symmetry meaning 5 segments arranged radially
    pentamerous
  22. starfish and sea stars
    asteroidea
  23. brittle stars
    Ophiuroidea
  24. sea urchins and sand-dollars
    Echinoidea
  25. sea cucumbers
    holothuroidea
  26. When under stress sea cucumbers will eviscerate the organs through __
    the anal pore
  27. sea lilies and feather stars
    crinoidea

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