BIOLOGY:LIFE ON EARTH-W/ACCESS
11th Edition
ISBN: 9780134669076
Author: Audesirk
Publisher: PEARSON
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Textbook Question
Chapter 24, Problem 3RQ
Briefly describe each of the following adaptations, and explain its adaptive significance: bilateral symmetry, radial symmetry, cephalization, closed circulatory system, coelom, segmentation.
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Describe the adaptations "bilateral symmetry", "radial symmetry", "cephalization", "closed circulatory system", "coelom", and segmentation.
Identify the two features of body plan that evolved with the cnidarians and ctenophores. Explain the significance of these features to their biological processes including locomotion, body support, reproduction, and development.
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? ______________________________
Locomotion and body support
Reproduction and development
Review the extent of segmentation in Polychaetes, Leeches, Siboglinids, Echicrans, and Sipunculans. Which morphological features must change to produce an unsegmented body cavity? Is there evidence of transitional stages for these features?
Chapter 24 Solutions
BIOLOGY:LIFE ON EARTH-W/ACCESS
Ch. 24 - 1. Which of the following groups contains radially...Ch. 24 - Prob. 2MCCh. 24 - 3. A coelom is
a. a body cavity that is partially...Ch. 24 - Prob. 4MCCh. 24 - 5. Which of the following groups does not include...Ch. 24 - Animals obtain energy by ______; they generally...Ch. 24 - 2. Bilaterally symmetrical animals have _____...Ch. 24 - Animals that have an anterior and posterior end...Ch. 24 - Prob. 4FTBCh. 24 - Animals that lack a backbone are described as;...
Ch. 24 - Three major groups within the mollusks are the...Ch. 24 - Phyla that contain animals with segmented bodies...Ch. 24 - Prob. 8FTBCh. 24 - Prob. 1RQCh. 24 - Prob. 2RQCh. 24 - Briefly describe each of the following...Ch. 24 - Prob. 4RQCh. 24 - Prob. 5RQCh. 24 - Prob. 6RQCh. 24 - Prob. 7RQCh. 24 - Prob. 8RQCh. 24 - 1. Insects are the largest group of animals on...Ch. 24 - Prob. 2AC
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- illustrates four key characters ofchordates: a notochord; a dorsal, hollow nerve cord; pharyngeal slits or clefts; and a muscular, post-anal tail.arrow_forwardHow useful is the study of the nature of body cavity and coelom in theclassification of animals?arrow_forwardSelect all of the following that are characteristics of crustaceans. maxillary glands. monoecious calcium carbonate deposited in the exoskeleton. two pairs of antennae. antennal glands. a body with three tagmata external fertilization.arrow_forward
- Coelomates have an enclosed coelom completely lined with mesodermally derived tissue. Accelomates have an enclosed coelom partially lined with mesodermally derived tissue. Pseudocoelomates have no enclosed coelom. true or falsearrow_forwardDescribe the annelid body plan, including body wall, segments, coelom and its compartments, and coelomic lining.arrow_forwardNematode worms and annelid worms share which of the following features? presence of a circulatory system molting absence of species with parasitic lifestyles presence of segmentation a digestive tract with two openings (a mouth and an anus)arrow_forward
- Compare and contrast the body coverings of a free-living turbellarian, a monogenaen fluke, a cestode, and a nematode. Which problems does each solve or create? Be sure to consider locomotion, permeability, ciliation, and habitat, and to think of the entire life cycle.arrow_forwardCompare Schizocoelom with enterocoelom based on coelom formationarrow_forwardDiscuss the idea that every evolutionary adaptation has both advantages and disadvantages, using each of the following as an example: (a) cephalization,(b) the arthropod exoskeleton, and (c) segmentation with specialization.arrow_forward
- Use examples to explain how the external morphology of cephalopods has changed over evolutionary timearrow_forwardExplain the difference between a Coelom and a pseudocoelom.arrow_forwardFor each of the following pairs of terms, provide one similarity and one difference: a) Planula and trochophore [2] b) Epidermis and neodermis [2] c) Mandibles and chelicerae [2] d) Dimorphism and metamorphosis [2] e) Spicules and dermal ossicles [2] f) Coelom and pseudocoelom [2]arrow_forward
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