Loose Leaf For Integrated Principles Of Zoology
18th Edition
ISBN: 9781260411140
Author: Cleveland P Hickman Jr. Emeritus, Susan L. Keen, David J Eisenhour Professor PhD, Allan Larson, Helen I'Anson Associate Professor of Biology
Publisher: McGraw-Hill Education
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Chapter 8, Problem 19RQ
Summary Introduction
To determine: The developmental characteristics used in diagnosing deuterostome and protostomes groups.
Introduction: The bilaterally symmetrical animals are classified into two groups, namely, Protostomia and Deuterostomia. The organisms that belong to these groups are termed protostomes and deuterostomes.
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Chapter 8 Solutions
Loose Leaf For Integrated Principles Of Zoology
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- 2) Identify the synapomorphies that unite the non-bilaterian phyla, as well as the protostome phyla, and the deuterostome phyla 3) Characterize each phylum of non-bilaterian and protostome phyla with their synapomorphies and differencesarrow_forwardMolecular sequence data indicate that Xenoturbella is a deuteros-tome. Are there corresponding morphological characters?arrow_forwardWhat are four synapomorphies and four symplesiomorphies of gnathostomes?arrow_forward
- What is the term of the morphology?arrow_forwardDifferentiate between Phylum Porifera and Clade Eumetazoa. A)Poriferans are only haploid during their life cycle, whereas eumetazoans are diploid with haploid sex cells at various stages of their life cycle. B)Poriferans have mobile gametes while eumetazoans do not. C)Poriferans invert during their development whereas eumetazoans do not invert at any time during their life cycle. D)The various cells types of Poriferans do not form permanent associations into true tissues during their life cycle, whereas Eumetazoa possess true, stable tissues. E)Poriferans have only one kind of cell during their life cycle whereas Eumetazoa have many kinds of cells throughout their life cycle.arrow_forwardWhat is the notochord?How is this structure formed?arrow_forward
- What is the function of the notochord? What organisms possess notochords throughout their lives and what organisms have notochords but degenerate in their early development?arrow_forwardDescribe the radiation in vertebrate forms from phylotypic stage by focusing on three groups of vertebrates and then tracing the development of several homologous features in each group. Connect specific embryological structures in the phylotypic stage to divergent morphological structures in the adults of each of these groups. (Answer all questions, if possible)arrow_forwardWhy are embryological features important for distinguishing the major groups of phyla?arrow_forward
- Why and how do you think the phenomenon of periodicity in filiarial worms evolved?arrow_forwardWhat are the physical similarities exist between each of the embryos? How does the pattern of embryological development provides evidence which supports common ancestry?arrow_forwardWhat is a nauplius? What is the difference between direct and indirect development in Crustacea?arrow_forward
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