TABLE 25.3 Comparison of Stages of Early Development in the Sea Urchin, Sea Star, Salamander or Frog, Fish, and Chick Organism Cleavage Sea urchin and sea star Salamander and frog Fish Chick Gastrulation Neurulation Organogenesis
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Review the stages of early development in animals. How are these stages similar in the animals you have studied? How do they differ? Complete Table 25.3. Thank you
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- Which is theextraembryonic membranewhose function is to storenitrogen wastes of theembryo? Is this functionpresent in placentalmammalian embryos?Which structure of the following forms the embryonic axis? O Primitive streak Notochord O Primitive knot O Primitive yolk sac17 of 20 Select the phrase which describes the process of coelom formation by schizocoely O Occurs in protostomes and involves mesodermal tissue that is located in the space between the ectoderm layer and the endodermal wall of the archenteron O Occurs in protostomes and involves buding of mesodermal tissue from the archenteron O Occurs in deuterostomes and protostomes and involves migration of neural crest cells around the interior of the ectoderm cell layer O Occurs in deuterostomes and involves differentiation of endodermal tissue into mesoderm which buds from the primitive gut. O Occurs in protostomes and involves rounding-up endodermal tissue which forms the primitive gut lumen
- give inherent constraints associated with the biology of the of zebra fish and quail orchicken eggs that hinders the complete assessment of its embryonic development conditions.Nematocysts in cnidarians are O reproductive cells excretory organs Osets of muscle cells O circulatory cells O defensive cellsWhat is the space Limited by the exo-coelomic membrane termed O primitive yolk sac Amniotic cavity Blastocyst Trophoblast
- Figure 29.22 Which of the following statements about the parts of an amniotic egg are false? The allantois stores nitrogenous waste and facilitates respiration. The chorion facilitates gas exchange. The yolk provides food for the growing embryo. The amniotic cavity is filled with albumen.Describe how the reproductive structures of each organism are adaptedtowards the given characteristics of the animals: 1. Parasitic lifestyle of Taenia solium 2. Vermiform body of the Ascaris suum 3. Absence of intromittent organ in Pheretima 4. Solitary and slow-moving lifestyle of Lissachatina fulica 5. Temperature regulation of mammalian sperm cell productionFrom a 24-hour chick embryo, provide the answers in the following: Pairs of somites in a 24-hour chick embryo Germ layer/s that forms the head process What begins the formation head of process Germ layer/s that form the proamnion Explain why the notochord is not visible in areas where the somites are seen