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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
characteristics of Eucoelomates
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organs in fluid as cushion
organs held by vascularized mesentary muscualar peristalsis organs free to move and grow |
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Phylum Molluska is the ________ largest phylum
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2nd
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Is bilateral symmetry & cephalization is common in P. Molluska ?
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yes
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Within P. Molluska they possess a _________ digestive tract
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complete
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Most org. in phylum molluska have what type of circulatory system
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open
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P. Molluska consist of Protostome Eucoelomates .......T/F
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True
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Modern molluska are thought to be derived from ___________planeria
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marine
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P. Molluska .....possess heart, liver, kidney , and gills.......T/F
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True
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Describe the mantle in P. Molluska
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It has 2 folds
and can secrete a protecive shell |
how many folds
what kind of shell does it secrete...what purpose does it serve |
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One who studies shells is refereed to as a ________
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malacologist, or the study of is called malacology
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Gills w/ incurrent and excurrent flow
o nutrients in o waste out o repro products in and out gametes in and out) lies within which cavity ? |
mantle
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this cavity is also used for Jet propulsion ?
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Mantle
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all organisms w/in P. Molluska have a well developed head......T/F
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False .....some have it some dont
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Tentacles are never present in the head....T/F
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False
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In Phylum Molluska, the head consist of a radula ? describe what it is and also its funtion
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Radula
o tongue w/ up to 250,000 teeth …used to scrape algae off of rocks o rasps food particles from surface o some bore into or harpoon prey Foot |
tongue...used to scrape what off rocks,
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In P. Molluska, the radula can be used to harpoon prey
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True
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In P. Molluska , the radula can be used as a " foot" T/F
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True
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Briefly explain the radula ,"being used as a foot" how does it occur? and where is it located?
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ventral posterior to mouth
uses the "blood engorgement technique, |
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the radula can be modified into muscle and tissue funtion.....T/F
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false...it can be modified into arms and tentacles
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Explain the economic importance of organisms that lie in P. Molluska ?
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some use it for food/ and also for their pearls .
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Explain the mechanism, and composition of the pearl in P. Molluska?
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o defensive against foreign object in mantle cavity,
o layered nacre( calcium carbonate & proteins) |
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what are some of the economical effects of slugs/snails ?
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o garden and agricultural pest
o intermediate host of parasites |
agricultural .... and host of _______?
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Reproduction wise..........most in P. Molluska are ________ and a few hermaphrodite
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• Most dioecious and few hermaphrodite
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monoecious or dioecious
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Briefly described the AQUATIC FORM reproduction process
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egg--→ motile trochophore larva→motile veliger larva-→adult
• some trochopore in egg • veliger w/ beginnings of foot, mantle and shell |
starts off w/ eggs------> motile _______larvae---------> motile ________larvae------> adult
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Describe the reproduction process in Chitons
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eggs -→ trochopore-→juv-→adult
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egg-------> ________. juv--------> ______
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