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AP BIOLOGY Evolution Activity #17 ANIMALS FOUR KEY EVOLUTIONARY BRACHES BRANCH 1 BRANCH 2 Activity #17 Page 1 of 6 BRANCH 3 Activity #17 Page 2 of 6 BRANCH 4 Activity #17 Page 3 of 6 QUESTIONS 1. Match the description or definition with the correct term. ______ Lack true tissues ______ True tissues ______ Radial symmetry ______ Bilateral symmetry ______ Two germ layers ______ Three germ layers ______ solid body; without a body cavity A. Acoelomate B. Bilateria C. Coelomate D. Determinate Cleavage E. Diploblastic F. Enterocoelous G. Eumetazoa H. Indeterminate Cleavage I. Parazoa J. Pseudocoelomate K. Radiata L. Schizocoelous M. Triploblastic ______ Body cavity that is not completely lined with mesoderm ______ Body cavity completely lined with mesoderm ______ Fate of each cell determined early in development ______ Cells produced by early cleavage retain capacity to develop into complete embryo ______ Solid mass of cells split to form mesoderm ______ Mesoderm forms form outpocketings of archenteron 3. Identify the germ layer (ectoderm, endoderm, or mesoderm) describe in each of the following. ______ Innermost germ layer ______ Covers the surface of the embryo ______ Middle layer ______ Gives rise to covering of animal and to the central nervous system in some phyla ______ Forms the muscle and most other organs between the gut and outer covering ______ Lines the primitive gut (archenteron) ______ Gives rise to the digestive tract and its outpocketings (liver and lungs) Activity #17 Page 4 of 6 4. Use the choices below to complete the following table comparing the major animal phyla. Tissue Complexity: Germ Layers: Coelom: Embryonic Development: Phylum Parazoa or Eumetazoa DNA (does not apply), two, or three DNA, Acoelomate, Pseudocoelomate, or Coelomate DNA, Protostome, or Deuterostome Tissue Complexity Porifera Cnidaria Platyhelminthes Nematoda Mollusca Annelida Arthropoda Echinodermata Chordata Activity #17 Page 5 of 6 Germ Layers Coelom Embryonic Development 5. Identify each of the following as true of Protostomes or Deuterostomes. ______ Coelomates ______ Radial cleavage ______ Indeterminate cleavage ______ Blastopore anus ______ Enterocoelous ______ Spiral cleavage ______ Determinate cleavage ______ Blastopore mouth ______ Schizocoelous 6. Identify the group of mammals represented by each of the following. A. Eutherians B. Marsupials ______ Lay eggs ______ Pouched animals ______ Placentals ______ Platypus, echidna ______ Kangaroo, opossum ______ Lion, tigers, bears, humans Activity #17 Page 6 of 6 C. Monotremes
