Biology ch 27-4
Help!
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| How did the zebra mussel get to the United States? | ships from ballast tanks
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| What problems do the zebra mussels causes for companies? | caused structural damage
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| what problems have they caused for native wildlife? | ate fish and depleted native mollusks population
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| What beneficial use might the zebra mussels have? | filter waste through water
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| How are chemists approaching the zebra mussel problem? | developing robotic submarines to pick them up
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| The latin word "mollusks" means: | soft
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| Name three animals that are considered to be mollusks: | snails, slugs, clams
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| what is the larval stage of the mollusk called: | trochophore
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| What are the four parts of the mollusk body? | foot, mantle, shell, and visceral mass
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| Do all mollusks have shells? | no
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| In what part of the body do you find the mollusk's internal organs? | visceral mass
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| What is the radula? | flexible tongue structure
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| What animals have a radula? | snails and slugs
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| How do clams and oysters get their food? | filter feeding
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| Do land snails and slugs have gills? where do they usually live? | no. in moist places
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| What type of mollusks can perform simple tasks and be trained? | octopi
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| How does the octopus move? | jet propulsion
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| How does a snail defend itself | withdrawing into shells
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| How does an octopus defend itself? | squirt ink
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| Name two animals in the Gastropod class | pond snails and land slugs
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| Gastropods are mollusks that move using a muscular | foot located on the ventral side
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| What gastropods is brightly colored (and is poisonous!) | nudibranchs
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| What CLASS of mollusks has two shells that are held together by powerful muscles | bivalves
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| How do scallops move around? | By flapping their shells
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| Name four animals in the Class Cephalopoda | Octopi, squids, cuttlefish, and nautiluses
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| The foot of a cephalopod is divided into: | tentacles or arms
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| What is the only cephalopod that has an external shell? | nautiluses
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| what is the internal shell found on a squid called? | pen
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| What is aquaculture? | the growth of aquatic animals and plants for use by humans.
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| When do georgian clams grow? | year round
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| How many years does it take for the clams to reach a size where they can be removed from hatcheries and put into the creeks? | 10
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| At five years, how large are the clams? | 65mm
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| How large are the clams at 10 years? | 80mm
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| How do mollusks "clean up" their surroundings? | filtering algae out of water or by eating depris.
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| Bivalves near "black smokers" are dependent upon _________ to produce their food. | volcanic vent
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| Bivalves can be used to monitor | water quality
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| Some mollusks never seem to develop what disease? | cancer
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| Kindom | animalia
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| phylum | mollusca
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| three classes | bivalve, cephalopods, gastropods`
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| gastropods | snails slugs nudabranchs
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| bivalves | 2 shells. clams
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