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Cards In This Set
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Which annelid group contains broadcast spawners?
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Polychaetes
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State something about the animal body cavity that is true
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A larva-may be a herbivore
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Mollusks are highly diverse in?
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Morphologymodes of nutritionreproductionresponse to environment
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Name some of the characteristics of the phylum mollusca
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Bilaterally symmetrical, triploblastic, coelomate protostomes
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What are the major groups of mollusks?
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-polyplacophora-Gastropoda-Bivalvia-Cephalopoda
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Body Plan of the mollusk
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 -Visceral mass-mantle-foot |
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Polyplacophorans
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-large muscular foot-ability to roll into a ball-gills located in mantle grooves-omnivorious-segmented shellradula scrapes algae and bryozoans
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Bivalvia
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-mantle cavity modified by siphons-enlargement of gill-relatively sessile-filter feeders-broadcast spawners
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What are siphons?
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Extension of posterior mantlewater flows in mantle cavity and then across fills that act as filters for food
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What is the foot used in the bivalves for?
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-anchor and digging
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What are the adductor muscles in scallops used for?
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Close shell
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What do mantle lined eyes do in scallops?
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Detect motion and light
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Gastropoda-shelled or shelllish (slugs)
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Herbivorespredatorsmore complex headinternal and external fertilization -dioecious(gonads separate individuals) or hermaphroditic --can't produce both eggs and sperm at the same time
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What is torsion?
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-twisting of body(180 degree rotation)mantle cavity anus moved over head
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Coiling of what?
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Visceral mass
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