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- The only class or group of Annelid worms which possesses a permanent clitellum is the: Hirudina Cestoda Oligochaeta Platyhelminthes Permoclitellata All lack a permanent clitellum PolychaetaThese differ from the other classes of sponges in that their cells are syncytial (multinucleate and only a few cells or even one cell can cover the entire skeleton) Hexactinellida Calcerea Demospongia HomescleromorphaAnnelida and arthropoda are more complex that other, simpler invertebrate groups because they have O a body cavity O segmentation germ layers
- Which phylum is characterized by a hard, flexible exoskeleton and multiple life cycles? Echinodermata O Mollusca O Chordata O ArthropodaPlease match the term with the description. the anterior end of a tapeworm that attaches to the inside lining of its host's digestive tract [ Choose ] [Choose] medusa describes the number of tissue layers in polyp coelom Cnidarians cnidocytes monoecious the cells that move water through a sponge gastrovascular cavity acoelom pharynx the cells that produce nematocysts scolex gonozooid osculum pseudocoelom triploblastic choanocytes diploblastic spongocoel water leaves a sponge through this opening proglottid spicule ventral sucker an incomplete digestive tract a planarian uses this to suck up food particles [ Choose ] a fluke uses this to hang onto its host's [ Choose ] tissues > > >Which of these organisms is NOT in the clade Lophotrochozoa? Cephalopoda Gastropoda Bivalvia C Platyhelminthes O Myriapoda
- A NEOMENIOMORPHA CHAETODERMOMORPHA POLYPLACOPHORA MONOPLACOPHORA B GASTROPODA CEPHALOPODA SCAPHOPODA BIVALVIA Which kind of phyletic group is represented by region A?.Class Cephalopoda is unique among the classes in Phylum Mollusca in that (they undergo direct development/ they have an open circulatory system/ they have a closed circulatory system)?Phylum Platyhelminthes Nemertea Gastrotricha Habitat Symmetry Germ Layer Give two classes belonging in each phylum. Locomotion Digestive Respiratory Circulatory System Excretory Nervous Reproductive Fertilizatio n
- Give contrasting external characteristics between Phylum Nematoda and Phylum Mollusca.Please match the term with the description. the anterior end of a tapeworm that attaches to the inside lining of its host's digestive tract [ Choose ] [Choose] medusa describes the number of tissue layers in polyp coelom Cnidarians cnidocytes monoecious the cells that move water through a sponge gastrovascular cavity acoelom pharynx the cells that produce nematocysts scolex gonozooid osculum pseudocoelom triploblastic choanocytes diploblastic spongocoel water leaves a sponge through this opening proglottid spicule ventral sucker an incomplete digestive tract a planarian uses this to suck up food particles [ Choose ] a fluke uses this to hang onto its host's [ Choose ] tissues > > >A closed circulatory system becomes an advantage when: (mark all that apply) there is a need for increased oxygen supply to muscles ever gills are no longer needed there is a need for decreased excretion of nitrogenous waste products or carbon dioxide adopting a sedentary or sessile life history the pressure within the circulatory system must be decreased O there is a need for increased oxygen supply to nerve cells