61. The Last Common Bilaterian Ancestor Your browser may not have a PDF reader available. Google recommends visiting our text version of this document. http://dev.biologists.org/cgi/reprint/129/13/3021.pdf

62. Coelomate Versus Acoelomate Body Plan (1) Coelomate versus acoelomate body plan (2) Protostome versus deuterostome development (3) Radial versus bilateral symmetry B. Explain how each of these . http://www.spyfu.com/Term.aspx?t=332375

63. Wiley InterScience :: Session Cookies Your browser may not have a PDF reader available. Google recommends visiting our text version of this document. http://doi.wiley.com/10.1002/jmor.1051880302

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64. Chapter 9 - The Acoelomate Animals The acoelomate animals, or animals that have no body cavity, include the phylum Platyhelminthes (Gr., platys flat, + helmins, worm) and the phylum http://www.kingsford.org/khsweb/science/biology/The_Acoelomate_Animals.htm

CHAPTER 9 THE ACOELOMATE ANIMALS PHYLUM PLALYHELMINIHES TISSUE-ORGAN LEVEL OF ORGANIZATION THE ACOELOMATE PHYLA The acoelomate animals, or animals that have no body cavity, include the phylum Platyhelminthes (Gr., platys flat, helmins, worm) and the phylum Rhynchocoela (Gr., rhynchos, beak, +koilos, hollow). In acoelomate animals the space between the body wall and the digestive tract is not a cavity, as in higher animals, but is filled with mesenchyme ( parenchyma ) and muscles, both derived from mesoderm. The platyhelminths, or flatworms, are a large and economically important group because they include not only the free-living planarians but also the parasitic tapeworms and flukes . The rhynchocoels (formerly called Nemertina) are the ribbon worms , often called nemertine or nemertean worms. They are all marine and are characterized by an eversibl proboscis that can be thrown out with great speed to capture food.

65. ScienceDirect - Molecular Phylogenetics And Evolution : Novelty In Phylogeny Of Your browser may not have a PDF reader available. Google recommends visiting our text version of this document. http://linkinghub.elsevier.com/retrieve/pii/S1055790399906504

Athens/Institution Login Not Registered? User Name: Password: Remember me on this computer Forgotten password? Home Browse My Settings ... Help Quick Search Title, abstract, keywords Author e.g. j s smith Journal/book title Volume Issue Page Molecular Phylogenetics and Evolution Volume 13, Issue 2 , November 1999, Pages 314-318 Abstract Abstract + References PDF (65 K) Related Articles in ScienceDirect Analysis of 18S rRNA gene sequences suggests significan... Molecular Phylogenetics and Evolution Analysis of 18S rRNA gene sequences suggests significant molecular differences between Macrodasyida and Chaetonotida (Gastrotricha) Molecular Phylogenetics and Evolution Volume 30, Issue 3 March 2004 Pages 850-854 Oleg G. Manylov, Natalia S. Vladychenskaya, Irina A. Milyutina, Olga S. Kedrova, Nikolai P. Korokhov, Gennady A. Dvoryanchikov, Vladimir V. Aleshin and Nikolai B. Petrov Abstract Partial 18S rRNA gene sequences of four macrodasyid and one chaetonotid gastrotrichs were obtained and compared with the available sequences of other gastrotrich species and representatives of various metazoan phyla. Contrary to the earlier molecular data, the gastrotrich sequences did not comprise a monophyletic group but formed two distinct clades, corresponding to the Macrodasyida and Chaetonotida, with the basal position occupied by the sequences of Tetranchyroderma sp. and

66. A Phylogenetic Analysis Of Myosin Heavy Chain Type II Sequences Your browser may not have a PDF reader available. Google recommends visiting our text version of this document. http://www.pnas.org/cgi/reprint/99/17/11246.pdf

67. Acoelomate - Definition From Merriam-Webster's Medical Dictionary Definition of acoelomate from MerriamWebster s Medical Dictionary with examples and pronunciations. http://medical.merriam-webster.com/medical/acoelomate

Home Visit Our Sites Unabridged Dictionary Learner's Dictionary ... Contact Us Also Visit: Unabridged Encyclopedia Britannica Visual ESL: Learner's for Kids: Spell It! Word Central Dictionary Thesaurus Spanish/English Medical Search "acoelomate" in: Dictionary Thesaurus Spanish/English Open Dictionary Browse words next to: acoelomate Browse the Medical Dictionary: A B C D ... Z acoelomate One entry found for acoelomate Main Entry: acoe·lo·mate Pronunciation: s -l m t Function: noun an invertebrate lacking a coelom; especially one belonging to the group comprising the flatworms and nemerteans (class Nemertea or Nemertinea) and characterized by bilateral symmetry and a digestive cavity that is the only internal cavity acoelomate adjective Learn more about "acoelomate" and related topics at Britannica.com Find Jobs in Your City Pronunciation Symbols Products ... Advertising Info

68. Ch. 10 a. usually flattened dorsoventrally, triploblastic, acoelomate, bilateral symmetry . a. triploblastic, acoelomate, bilateral sym., unsegmented worms http://www.ltcconline.net/kloss/bio212/ch__10.htm

Ch. 10 - Acoelomates - Miller and Harley I. Evolutionary perspective A. Phyla Platyhelminthes, Gastrotricha and Nemertea were the first to exhibit bilateral symmetry and more complex body organizations than Cnidarians. B. All these are triploblastic acoelomates C. Platyhelminthes - 1. flatworms 2. tapeworms 3. flukes D. Nemertea - small group of elongate, unsegmented soft bodied worms, mostly marine and freeliving E. Phylum Gastrotricha includes members that inhabit space between bottom sediments II. Phylum Platyhelminthes A. Characteristics: 2. Range in size from 1 mm to 25 m. 3. ectoderm becomes epidermis, endoderm becomes gv cavity 4. mesodermal tissues include parenchyma - filler tissue a. skeletal support b. nutrient storage c. motility d. reserves of regenerative cells e. transport of materials f. O2 storage, etc 5. First phylum we’ve looked at w/ organ level system of organization 6. Characteristics of Phylum Platyhelminthes a. usually flattened dorsoventrally , triploblastic, acoelomate, bilateral symmetry b. unsegmented

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