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Unit 5: The Evolutionary History of Diversity Invertebrates Review
  1. Invertebrates do not have a , and account for 95% of known animal species.
     
     
     
     
  2. Phyla and are the multicellular sponges.
     
     
     
     
  3. Phylum belong in the clade with true called . This phylum is diploblastic and is divided into four major classes: Hydrozoa, Scyphozoa, Cubozoa, and Anthozoa.
     
     
     
     
  4. Most Eumetazoa belong to the clade and exhibit symmetry and triploblastic embryonic development.
     
     
     
     
  5. Phylum are flatworms with a gastrovascular cavity that lacks a . The classes are: Turbellaria, Monogenea, Trematoda, and Cestoidea.
     
     
     
     
  6. Phylum are tiny animals, smaller than many protists. .but are truly multicellular and have specialized organ systems
     
     
     
     
  7. Phylum are soft-bodied animals. The major classes are: Gastropoda, Bivalvia, and Cephalopoda,
     
     
     
     
  8. Phylum are segmented worms with a true . The major classes are: Oligochaeta, Polychaeta, and Hirudinea.
     
     
     
     
  9. Phylum are roundworms with a . Some nematodes are human parasites that include Trichinella and Ascaris. playvideo
     
     
     
     
  10. Phylum have bodies. The major subphyla are: Cheliceriformes, Myriapoda, Hexapoda, and Crustacea.
     
     
     
     
  11. Phylum are . The classes are: Asteroidea. Ophiuroidea. Echinoidea, Crinoidea, Holothuroidea, and Concentricycloidea.
     
     
     
     
    Summary. 
     
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
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