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17 Cards in this Set
- Front
- Back
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What are the three classes of mollusks?
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gastropods, bivalves and cephalopods
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Give an example of a mollusk.
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a snail
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Give an example of a bivalve.
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clam
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Give an example of a cephalopod.
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squid
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Give the characteristics of a slug or snail.
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A slug has a coiled shell, a broad foot, and has a head with sensory antennae.
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Give the characteristics of the bivalve animal called a scallop.
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A scallop has a two piece shell, a flat internal shaped foot, and no head.
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Describe a squid from the cephalopod group of mollusks.
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Squid have a small shell within the body, tentacles with suckers instead of a foot, and have a head with large eyes and a well developed brain.
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What are the main characteristics of mollusks?
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an invertebrate with a soft unsegmented body, usually have a hard external shell with a thin layer of tissue coveing the internal organs, and most have a muscular foot.
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What is a mantle?
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a thin layer of tissue that covers mollusk's internal organs.
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Describe how gastropods move.
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slide on a layer of mucous produced by a foot
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How do bivalves move?
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they are mostly immobile though some pull themselves with a foot or swim by clapping their shells together.
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How do cephalopods move?
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Cephalopods swim by using tentacles or by squirting water out of their siphon.
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Describe how a gastropod feeds.
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Gastropods can be carnivors, scavengers or herbivores and use radula to scrape off food.
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How do bivalves feed?
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Bivalves strain their food from water. They use gills to capture food as they breathe.
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How do cephalopods feed?
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Cephalopods are carnivores and use tentacles to capture prey.
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Describe the habitat of gastropods.
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Gastropods are mostly aquatic and found on the floor of marine or fresh water
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Describe the habitat of bivalves.
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Bivalves are all aquatic and live mostly in marine waters. They are on the floor or sometimes attached to rocks or seawalls.
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