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11 Cards in this Set

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Describe how mucus is important to some mollusks.
Mucus protects some mollusks. It also enables mollusks to stick to surfaces and slide easily through their habitats.
What adaptations make cephalopods effective predators in an aquatic biome?
jet-propulsion-type swimming, tentacles with suckers, large eyes with a well-developed nervous system, radula for tearing apart prey
Compare and contrast filter feeding with obtaining food by using a radula in an aquatic biome.
A filter feeder takes in water and filters out food. The radula is a tongue-like organ that scrapes food from surfaces
Compare how squids and sea slugs protect themselves in the marine biome.
Squids protect themselves by their ability to move quickly away from danger. Sea slugs incorporate consumed toxic materials(poison) into their tissues.
How are the methods of movement for the snail, clam, and squid related to the structure of each one's foot?
The muscular foot of the snail secretes mucus on which the snail glides slowly. The clam can burrow into sand with its muscular foot. The squid’s foot is modified into tentacles that aid in movement
Develop a classification key to identify the similarities and differences of the three classes of mollusks discussed.
Gastropods- one shelled mollusks or no shell, largest class of mollusks. Live in freshwater, saltwater, or moist land environments. Can be plant eaters, predators, or parasites. Can protect themselves with shells or poisonous injection. Bivalves- two shelled mollusks, include clams oysters, and scallops. Most live in marine biomes, some live in freshwater. No distinct head or radula. Got a foot that helps it burrow in mud. Ligament connects two shells called valves. Muscles help valve open and close. Filter feeders. Cepholopods- head and foot mollusks, include octopus and squid. One has an external shell, but most dont. Some have an internal shell. Have suckers and tentacles that help them catch prey. Use radula to eat. Use jet propulsion to escape, as well as ink.
a membrane that surrounds the internal organs of mollusks; in mollusks with shells, it secretes the shell.
mantle
in some snails and mollusks, the rasping, tonguelike organ used to drill, scrape, grate, or cut food
radula
system where blood moves through vessels into open spaces around the body organs.
open circulatory system
system in which blood moves through the body enclosed entirely in a series of blood vessels; provides an efficient means of gas exchange within the body.
closed circulatory system
organs that remove metabolic wastes from an animal's body.
nephridia