Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 32.1, Problem 1R
Summary Introduction
To review:
The common developmental stages, which are found in all deuterostomes. Also, the reason for the invalidation of some of these traits as a strong evidence for the monophyly of deuterostomes.
Introduction:
Deuterostomes are the class of organisms, which include sea animals like echinoderms and hemichordates, as well as land animals like chordates, including man himself. All these groups of animals do not share morphological characters. Yet, they are similar on the basis of developmental traits, which classify them under deuterostomes.
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Chapter 32 Solutions
Life: The Science of Biology
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- What are some differences between protostomes and deuterostomes?arrow_forwardWhich of these is found in all deuterostomes? 3 tissue layers a notochord a dorsal hollow nerve cord paired appendages ALL of these features are found in all deuterostomesarrow_forwardEach of the following is a critical difference between protostomes and deuterostomes except A. deuterostomes have bilateral symmetry B. the blastopore becomes the anus in deuterostomes C. the blastopore becomes the mouth in protostomes D. protostomes have radial symmetryarrow_forward
- List four differences between protostomes and deuterostomes.arrow_forwardAre Protostome and Deuterostomes only applicable to tripoblastic animals?Are Cnidarians even protostome or deuterostomes?arrow_forwardTriops evolved 350 million years ago and its morphology has not changed much throughout time. Why do you think this? Explain.arrow_forward
- Why are echinoderms considered part of the Deuterostomes, despite having incredibly unique morphology?arrow_forwardOnly eight species of lobe-finned fishes are alive today, remnants of a group that flourished in the Devonian period of the Paleozoic era. What morphological characteristics distinguish lobe-finned fishes? What is the literal meaning of Sarcopterygii, the taxon comprising lobe-finned fishes and tetrapods?arrow_forwardWhich of the 4 characteristics of Phylum Chordata is visible on this organism? Pharyngeal slits Dorsal hollow nerve cord Notochord Post-anal tailarrow_forward
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From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license