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13 Cards in this Set
- Front
- Back
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what characteristic is responsible for the branching off of the mollusks from earlier animals? |
coelomates soft bodied and unsegmented |
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what level of organization do these organisms demonstrate? |
organ system level |
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how many tissue layers do these organisms have? |
triploblastic |
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what three parts do all mollusks possess? |
muscular foot for movement, visceral mass containing internal organs and mantle may secrete a shell |
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what is the name of rasping organ most species possess? which class is missing this organ?
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radula, except bivalves |
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type of digestive system? |
alimentary canal, extra and intracellular |
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type of excretory system? |
metanephridia |
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type of circulatory system? |
open systems with 3 chambered heart |
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type of respiratory system? |
gills or lungs |
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type of nervous system? |
paired cerebral ganglia or nerve ring with nerve cords |
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type of body cavity? |
eucoelomate |
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type of asexual reproduction? |
none |
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type of sexual reproduction? |
gametes, monoecious and dioecious |
