mollusca - campbell high
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Phylum Mollusca
Warm up 4/8
1. What structure do corals and anemone share?
2. What are the symbiotic algae called that live with coral? What kind of example is this called?
3. What does the algae provide to the coral? What does the coral provide to the algae?
4. What is the skeleton that corals make made out of?
Phylum Mollusca
EQ
Describe the characteristics of Mollusca that make them unique.
Classes of mollusca
There are seven main classes of Mollusca (we’ll learn 3 main ones):
Bivalvia
Gastropoda
Cephalopoda
Defining characteristics
Every mollusk has a head, a foot and a visceral mass, usually covered by the mantle
Bivalvia
Bivalvia is a group that has a two-halved shell. Examples: clams, oysters, scallops
Habitats: Marine, estuarine, freshwater
Shapes: mostly two-shelled, some worm like
Feeding type: mostly suspension feeders, some detritovores
Gastropoda
Gastropoda are the only mollusks to have gone onto land, most diverse w/body and shell morphology. Ex: Snails, opihi, slugs, sea hares, cone snail
Habitats: Saltwater, freshwater, estuaries, land
Shapes: Many have one shell which the animal can withdraw
Feeding types: Herbivores, carnivores. Most feed using a radula.
Radula
Cephalopoda
Cephalopoda are the most intelligent and mobile of all mollusks. Have 3 hearts. Ex: Squid, octopuses, cuttlefish, nautiluses.
Habitats: Marine
Shapes: two eyes, mantle, a siphon and eight tentacles. Have beak for feeding. Suction cups on tentacles.
Feeding types: Carnivorous
Cephalopod behavior
Extremely intelligent, can be trained to perform specific behaviors
Change color using chromatophores, pigment filled cells on the body
Some have bioluminescence, creation of light through photophores
Have an ink sac in which to escape predators with
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