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 18, Problem 20RQ
Summary Introduction
To list: The members of the predominant body plan of each of the protostome phylum.
Introduction: The clade of animals that undergo protostomy during their embryonic development is called protostome. It possesses phyla including annelids, arthropods, and molluscs.
Summary Introduction
To discuss: The way in which the picture of protostome evolution would change if each of the body plan was a homologous character.
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List the predominant body plan (acoelomate, pseudocoelomate, or coelomate) for members of each protostome phylum and discuss how our picture of protostome evolution would change if each body plan were a homologous character
Download a phylogenetic tree of Bilateria that includes the ten phyla of bilaterian discussed in this module. From the tree, be able to identify whether members of the phylum are coelomates (C), pseudocoelomates (P), or acoelomates (A). Use your labeled tree to answer the following questions:
a) For each of the three major clades of bilaterian, what can be inferred about whether the common ancestor of the clade had a true coelom?
b) To what extent has the presence of a true coelom in animals changed over the course of evolution?
An unidentified animal is noted to possess the following characteristics:
triploblastic eucoelomate body
a cuticle that is shed via ecdysis
To which of the following phyla does this organism belong?
Group of answer choices
A. Echinodermata
B. Annelida
C. Arthropoda
D. Nematoda
Chapter 18 Solutions
Loose Leaf For Integrated Principles Of Zoology
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