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 |