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Giant Squid 4
mollusks - general, aplac, mono, scaph, gast, poly
| Question | Answer |
|---|---|
| Mollusks are characterized by soft bodies, ______, and shells. | mantles |
| Mollusks are the first animals to have _____, a fluid filled body cavity that anchors organs. | coelom |
| _______ have a more efficient blood supply to organs than acoelmates or pseudocoelmates. | coelomates |
| type of mollusk symmetry | bilateral |
| What phylum do slugs belong to? | mollusca |
| What class do slugs belong to? | gastropoda |
| What class do the rare mollusks which lack shells belong to? | aplacophora |
| What class do the rare mollusks which have one shell and show segmentation belong to? | monoplacophora |
| What class do the sedentary tusk shell mollusks belong to? | scaphopoda |
| Do mollusks have circulatory or respiratory organs? | yes |
| Do mollusks use diffusion for respiration? | yes |
| T/F most mollusks are dioecious. | true |
| The mollusk body can be divided into two main regions: the head-foot and the _____ | visceral mass |
| The _____ develops from two folds of skin arising from the dorsal body wall | mantle |
| The mantle produces the shell and _____ | respiratory organs |
| The _____ creates a cavity and water currents that bring in food and get rid of wastes. | mantle |
| Most mollusks have a ____ circulatory system. | open |
| Blood remains in vessels that attaches directly to organs in a _____ circulatory system. | closed |
| Blood leaves vessels and bathes over organs in a ______ circulatory system. | open |
| Mollusks have ____ digestive systems | complete |
| This is the scraper part of the mouth: | radula |
| ___% of mollusks have one or more shells. | 99 |
| Mollusk shells consist of three layers containing ____ and calcium | protein |
| The oldest part of a mollusk shell is called ______ | umbo |
| T/F complex mollusks have ganglia | false |
| Aplacophorans live in ____ water ecosystems | salt |
| Until 1952, scientists thought which class of mollusks were extinct? | monoplacophora |
| Chitons belong to which mollusk class? | polyplacophora |
| How many plates make up the polyplacophora shell? | 8 |
| Polyplacophorans live in the _____ zone of the ocean | intertidal |
| What do chiton eat? | algae |
| The _____ is the largest class of mollusks. | gastropoda |
| The only class of mollusk which exhibit torsion are the _____ | gastropoda |
| The 180 degree twisting of internal organs and the shell: | torsion |
| The spiraling of the shell: | coiling |
| Which type of aquatic habitat is home to gastropods? | freshwater and marine |
| T/F most gastropods are herbivores. | true |
| ____ are animals that eat dead or decaying organisms | scavengers or detrivores |
| What do filter feeders eat? | plankton |
Created by:
Mrs. Bridgman