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33 Cards in this Set
- Front
- Back
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the methods of feeding used by members of the phylum Annelida include: |
suspension, deposit, parasitism, predation, and herbivory |
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the process of torsion describes |
the roatation of visceral mass in gastropoda |
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parasitic larvae are found in which taxonomic group |
bivalvia |
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dilatency is used by annelids to |
solidify sediments |
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annelids are spiralians, characterized by |
trocophore larva |
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the combined sexual and asexual reproductive process called blank is found in some species of blank |
1 - epitoky 2 - polychaetes |
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sipunculids can be distinguished from echiurans because sipunculids don't have |
- a non-retractable introvert - a few pairs of chaetae - parapods - a crystalline style - a terminal mouth/anus - a large coelomic cavity |
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best environment for these four families 1 - Sabellidae 2 - Arenicolidae 3 - Aphroditidae 4 - Serpulidae |
1 - feeding with fan extended 2 - burrowing mud 3 - crawling over mud 4 - in a carbonate tube |
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the largest member of the phylum Pogonophora can be found |
near deep-sea hydrothermal vents |
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the overall flow of water through radioles (pinnules) of the fan of a feather-duster worm is |
through the underside of the radioles up and away from the mouth |
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order of most to least constraint of body plan |
nematoda, annelida, nemertea, mollusca |
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in bivalve molluscs, closure of the shell is under the control of blank while the shell is opened by blank |
the adductor muscles the elastic reilium |
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aquatic molluscs generally excrete blank as their primary nitrogenous waste |
ammonia |
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cephalopods are distinct among molluscs because |
they have a closed circulatory system |
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Glyceridae |
blood worms, used for fishing bait |
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Pogonophora (deep see tube worms) |
- chemoautotrophic, has trophosome (colonized by bacteria supplying host worm with food and energy) - gutless worms, - bears an opisthosoma |
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Pulmonata |
garden slugs |
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Archaeogastropoda |
gastropod w/ two gills, herbivores, no siphon |
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Hirudinea (leeches) |
gut bacteria digest blood, uses an anesthetic to feed |
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Pectinariidae (ice cream cone worms) |
tubes of sand grains |
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Arenicolidae (lugworms) |
important deposit feeders |
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Pteriomorpha |
mussels, scallops, and oysters |
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Echiura (spoon worms) |
non-retractable proboscis |
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Priapulida (marine worms) |
pharynx w/ spines, introvert, caudal appendage |
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Errantia |
polychares that have large heads/eyes/swim |
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Oligochaeta |
segmented worms with chaetae, no parapods |
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Gastropoda |
exhibit torsion |
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Scaphopoda |
tusk shells |
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Serpulidae |
christmas tree worm w/ tube of carbonate |
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compare penetration formation in clams and polychaetes |
clams - uses it's foot as the anchor, using hemocoeal as hydrostatic skeleton and muscles around it to burrow, when the blood fills the foot to its most full the pressure acts as an anchor polychaete - uses separate segments as a penetration anchor, using the contraction of longitudinal muscles against the coelomic cavities to thicken those segments combined with chaetae in the burrow wall to act as an anchor |
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crystalline style |
1 - gelatinous rod of enzymes in crystalline form 2 - found in the style sac, part of the anterior portion of the gut 3 - produced by specialized secretory cells at one end and worn away as it spins by the action of cilia; spinning rod mixes gut cotents and grinding of the rod against the shield release digestive enzymes |
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note parapod drawing on exam |
note parapod drawing on exam |
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how have Cephalopods modified ancestral molluscan form to excel at 1 - swimming and 2 - predation |
1 - the foot formed a funnel/siphon, while the mantle became a water bag for propulsion. parts of the mantle modified to form fins. a lost shell gives buoyancy 2 - molluscs have developed large, visually acute eyes. radulas adapted to form beaks for tearing crabs. mantle modified to form tentacles and sucke disks |
