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PBHS Zoology Ch 16
Phylum Mollusca
| Question | Answer |
|---|---|
| largest phylum after Arthropoda, ~50,000 living species | Phylum Mollusca |
| examples of large mollusks | Architeuthis & Tridacna gigas |
| mollusks have _______________ symmetry | bilateral |
| mollusks are classified based on the shape and purpose of this organ which is used mostly for locomotion | foot |
| this organ secretes the shell of the mollusk | mantle |
| mollusks contain a true __________ which is a body cavity | coelum |
| many mollusks have a sharp harpoon-like rasping organ called a ________ | radula |
| this class of mollusks have oval shells that lie close to the rock ... they scrape food off of the rock with the radula, chitons are the most common name | Polyplacophora |
| most common Polyplacophora | chiton |
| this class have tooth-shaped shells and mostly live at very deep depths | Scaphopoda |
| this class of Mollusk has both shelled (snails) and unshelled (slugs) forms | Gastropoda |
| largest and most diverse class of mollusks | Gastropoda |
| an example of a genus of Gastropod from the survey lab | Helix |
| this class of Mollusk has two shells | Bivalvia or Pelecypoda |
| the name Pelecypod means __________ | hatchet foot |
| Bivalves have no _____________________ which means they have no head | cephalization |
| this class of Mollusk has an internal shell, tentacles, is known for its intelligence | Cephalopoda |
| Phylum Playhelmenthese consists of different versions of ______________worms | flat |
| Phylum Nematoda consists of different versions of ______________worms | round |
| the most well-known members of both Phylum Platyhelminthese and Nematoda are ____________ | parasites |
| this class of flatworms are leaf-shaped and have varieties that live on most internal organs | flukes or Class Trematoda |
| this class of flatworm have hooks instead of mouths, proglottids (body segments) that have both sex organs | tapeworms or class Cestoda |
| this class of flatworm is mostly non-parasitic, lives in in both freshwater and marine water | planarians or class Turbellaria |
| common in SE Asia, the liver fluke, can get from undercooked fish | Clonarchis sinensis |
| blood flukes cause this disease, ~200 million people worldwide, passed in water via feces/urine | Schistosomiasis |
| many flatworms do not have a ________________ ... they absorb food through their skins | digestive system |
| clam dissection: pointy part of the outer shell | umbo |
| clam dissection: concentric circles on shell | growth rings |
| clam dissection: large central 'hatchet-shaped' organ | foot |
| clam dissection: attached to the inner parts of the shell, secretes the shell | mantle |
| clam dissection: flat flaps of skin on either side of the foot, used for gas exchange (breathing) | gills |
| clam dissection: small flaps on either side of the mouth | labial palps |
| clam dissection: green internal organ | digestive gland |
| clam dissection: two large attachment organs | adductor muscles |
Created by:
kcshiker
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