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