Ch. 32 bio

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patterson911
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51659
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Ch. 32 bio
Updated:
2010-11-25 12:06:23
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protosomes
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ch. 32 bio
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  1. Chelicerata charateristics?
    • · Mostly terrestrial or marine
    • · Lack antennae
    • · Body consists of cephalothorax and abdomen (most)
    • · Six pairs of appendages:
    • § 1 pair chelicerae – claw-like feeding appendages
    • § 1 pair pedipalps – sensory structures
    • § 4 pairs walking legs
  2. What are some examples of Chelicerata?
    (horseshoe crabs, spiders, scorpions, harvestmen, mites, ticks)
  3. Centipedes?
    one pair of legs per segment; carnivorous
  4. Millipedes?
    two pairs of legs per segment; herbivorous
  5. Myriapoda characteristics?
    • · Terrestrial
    • · Body divided into head and trunk
    • · Head with mandibles and antennae ( 1 pair )Body with many legs
  6. Complete metamorphosis?
    exhibit 4 life stages [egg à larva à pupa à adult]
  7. Incomplete metamorphosis?
    exhibit 3 life stages [egg à nymph à adult]
  8. Hexapoda characteristics?
    • · Dominant terrestrial arthropods
    • · Body has 3 sections: head, thorax and abdomen
    • · Antennae (1 pair)
    • · Mouthparts – mandibles modified for chewing , sucking, sponging, or lapping
    • · Three pairs of legs on thorax
    • · Two pairs of wings ( most )
    • · Breath via tracheae – unique to insects; open to outside via spiracles
    • · Exoskeleton periodically molted.
  9. What are some examples of Hexapoda?
    ( dragonflies, grasshoppers, true bugs, mantophasma, beetle, flies, bees, butterflies)
  10. Crustacea characteristics?
    • · Mostly marine and freshwater
    • · Body of most with 2 sections: cephalothorax and abdomen
    • · Appendages on thorax and abdomen
    • · Two pairs of antennae
    • · Mandibles as mouthparts
    • · Dioecious ( most)
    • · Nauplius larva
    • -krill- main food item of baleen whales
  11. What are some example of Crustacea?
    (crabs, crayfish and lobsters, shrimps, krill, copepods, isopods, barnacles)
  12. What are the four major arthropod groups?
    • Crustacea
    • Hexapoda
    • Myriapoda
    • Chelicerata
  13. Trilobites are?
    earliest authropods to evolve
  14. Diversity and success related to body plan are?
    segmented bodies, hard exoskeleton and jointed appendages.
  15. Arthropoda (“jointed feet”) characteristics?
    • · Jointed appendages
    • · Coelomate (reduced as a hemocoel)
    • · Segmented body
    • · Exoskeleton composed of protein and chitin (provides protection and waterproofing; must be molted)
    • · Muscles attached to exoskeleton
    • · Well-developed sensory organs
    • · Open circulatory system – hemolymph percolates through hemocoel.
  16. Parasitic nematodes of humans?
    pinworms, hookworms, Filarial worms – cause elephantiasis, trichinella spiralis – causes trichinosis
  17. Parasitic nematodes of plants feed on roots?
    inhibit plant growth, reduce yields and distort root structure.
  18. Nematoda (roundworms) charateristics?
    • · Ubiquitous
    • · Free-living or parasitic
    • · Unsegmented body; tapered at both ends
    • · Pseudocoelomate
    • · Thick cuticle (shed 4 times)
    • · Complete digestive tract
    • · Longitudinal muscles
    • · Dioecious ( Female are larger than male)
  19. What are the Ecdysozoans?
    • Nematoda (roundworms)
    • Arthropoda (“jointed feet”)
  20. Cephalopoda characteristics?
    • Marine
    • · Head surrounded by grasping tentacles, usually with suckers
    • · Shell external, internal or lacking
    • · Mouth with or without radula
    • · Only mollusks with closed circulatory system
    • · Locomotion by jet propulsion using siphon (modified foot)
    • · Predators
  21. Gastropoda (aposmatic coloration) characteristics?
    • · Marine, freshwater, terrestrial
    • · Head present
    • · Coiled shell (most)
    • · Many are monoecious
    • · Foot used for locomotion
    • · Have radula
  22. Bivalvia characteristics?
    • · Marine and freshwater
    • · Hinged, laterally flattened shell
    • · Mantle forms incurrent and excurrent siphons
    • · Reduced head
    • · No radula
    • · Filter feeders
  23. What is an example of Cephalopoda?
    squid, octopus, cuttlefish, nautilus
  24. What is an example of Gastropoda (aposmatic coloration)?
    slugs, snails
  25. What is an example of Bivalvia?
    clams
  26. Polyplacophora (chitons) characteristics?
    • · Marine
    • · Shell with 8 plates
    • · Foot used for locomotion
    • · Radula used to scrape algae from rocks
  27. What are four classes of mollusks?
    • Polyplacophora (chitons)
    • Bivalvia
    • Gastropoda (aposmatic coloration)
    • Cephalopoda
  28. Mollusks characteristics?
    • · Coelomate (reduced)
    • · Mostly marine
    • · Most have an open circulatory system and a hard shell of calcium carbonate
    • · Body has 3 main parts: foot, visceral mass and mantle
    • · Most are dioecious
    • · Trochophore larval stage in marine mollusks

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