classifying animals

Jennifer C.
11 words 1 learner

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Full list of words from this list:

words only definitions & notes
  1. invertebrate
    any animal lacking a backbone or notochord
  2. cnidarian
    radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
  3. vertebrate
    animals having a bony or cartilaginous skeleton
  4. mollusk
    aquatic invertebrate, often with a shell
  5. echinoderm
    marine invertebrates with tube feet and five-part radially symmetrical bodies
  6. arthropod
    invertebrate having jointed limbs and a segmented body
  7. endoskeleton
    the internal skeleton; bony and cartilaginous structure
  8. exoskeleton
    the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs
  9. monotreme
    the most primitive mammals comprising the only extant members of the subclass Prototheria
  10. marsupial
    a mammal the female of which has a pouch carrying the young
  11. placental mammal
    mammals having a placenta
Created on Sun Nov 07 13:30:29 EST 2010 (updated Sun Nov 07 16:48:41 EST 2010)

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