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Domain EukaryaKingdom Animalia
Phylum Mollusca(or soft-bodied)
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Phylum MolluscaCharacteristics*Soft-bodied invertebrate covered with protective mantle that may or may not form a hard, calcium carbonate shell *Second largest animal phylum. Largest Marine phylum *Have a muscular foot for movement which can be modified into tentacles*Complete, one-way digestive tract with a mouth & anus *Cephalization - have a distinct head with sense organs & brain *Have a scraping, mouth-like structure called a radula* *Go through free-swimming larval stage called trochophore
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radula
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Eastern mudsnail (Ilyanassa obsolete) orCommon periwinkle (Littorina littorea) observation and experimentation
Get to know your subject:• Diagram and label snail using the laptop or textbook as guide• Make at least five behavioral observations• State two differences among individuals in your groupExperiment:• Create an experiment to learn something about snails in general.• On a piece of butcher paper you will write up your findings.
Include:• Purpose (1 sentence)• Hypothesis (1 sentence)• Data (table and graph)• Conclusion (one paragraph. State WHY data is as it is)
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Class 1 of 3:Bivalves (or 2 doors)most abundant phyla
They include:clamsoystersmussels
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characteristics:Byssal threads with cementChemoreceptor tentaclesLight detection cells
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Class 2 of 3:Gastropods (or stomach-foot)
They include:nudibranchs (or naked gills)snailslimpetschiton
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Why so bright?
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• Snail egg in leg• Killer cone snail• Snail zombies
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Class 3 of 3:cephalopods (or head-foot)
They include:NautilusSquidoctopuscuttlefish
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Mollusca
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Intelligent, in their own way• Camouflage video• Chromatophores video• Octopuses are smart and squish
y• Octopus sneaks back to sea• Dumbo octopus: really cute• Vampire squid: weird
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Squid Anatomy (male)
squid dissection
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colossal squid dissection interactive