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rotifers and mollusc

Biology: Zoology

QuestionAnswer
Phylum Mollusca..Classes? Monaplacophora, Caudofoveata, Scaphopoda, Polyplacophora, Solenogastres, Gastropoda, Bivalvia, Cephalopoda
Mollusca Body Cavity? Coelomates
Coelomates? true coelom lined with mesodermally peritoneal tissue
Bilateral Mollusca? head foot and mantle/visceral mass
Class Monoplacophora? one plate bearing
Class Polyplacophora Many plate bearings, chiton
Class Caudofoveata? Dioecious, Worm like with radula and gilld
Class Solenogastres Monoecious, worm like with no gills and sometimes radula
Class Cephalopoda Loligo
Class Scaphopoda tusk shells
Class Gastropoda Snails and slugs
Class Bivalvia Cyrtonalac
Reporduction stages, Mollusca? Veliger larva, Glochidium larva, Trochophore larva
Trochophore larva? Free swiming, emerges from egg
Glochidium larva? freshwater, attach to gills and parasitize fish
Veliger larva? Marine, free swimming, beginnings of foot, mantle shell
Metanephridia one or two kidneys
respiration in Mollusca? uses lungs, gills, or diffusion
Do Mollusca have a complete or incomplete digestion system? complete, complex system
Purpose of Mantle? for gas exchange and shell secretion
Visceral Mass purpose? contains reproductive organs, digestive, circulatory, respiratory
Classes of Phylum Rotifer? Seisonidea, Monogononta, Bdelloidea
Body Cavity of Rotifers? Pseudocoelomate
Pseudocoelomate? Not completely lined with tissue derived from mesoderm.
Locomotion of Rotifers? some sessile, some use foot to creep, some use cilia on corona (wheel organ)
Reproduction of Rotifers? Dioecious and two types of eggs.
Parthenogenic organisms? Females produce offspring without males fertilization of egg using amictic eggs
Class Bdelloidea? Parthenogenic, diploid amictic eggs all females
Class Seisonidea? sexual reproduction only. haploid mitic eggs that must be fertilized by males.
labial palps ciliated and serve to guide food particles trapped in mucus into the mouth
Purpose of the foot? for anchoring itself or drawing the body forward.
What is the umbo? the tip of the shell helps against predators
What is the funnel? HELPS SQUID MOVE BY PUSHING WATER OUT
What is the Corona? Wheel organ used for locomotion.
what is the mastax? used to grind food
Created by: 1571675233
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