EBK CAMPBELL BIOLOGY
11th Edition
ISBN: 9780134505589
Author: Urry
Publisher: PEARSON CO
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Chapter 32.3, Problem 3CC
Summary Introduction
To evaluate: The claim that worms, humans, and most other triploblasts have a shape analogous to that of a doughnut.
Concept introduction: Animals can be grouped into diploblastic and triploblastic on the basis of number of germ layers possessed by them. Diploblastic animals are those that contain only two germ layers. Cnidarians and a few other groups of animals are diploblastic.
On the other hand, triploblastic are animals that contain three germ layers. The triploblasts consist of a number of animals ranging from
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Chapter 32 Solutions
EBK CAMPBELL BIOLOGY
Ch. 32.1 - Summarize the main stages of animal development....Ch. 32.1 - WHAT IF? What animal characteristics would be...Ch. 32.2 - Put the following milestones in animal evolution...Ch. 32.2 - VISUAL SKILLS Explain what is represented by the...Ch. 32.2 - MAKE CONNECTIONS Evaluate whether the origin of...Ch. 32.3 - Distinguish the terms grade and clade.Ch. 32.3 - Compare three aspects of the early development of...Ch. 32.3 - Prob. 3CCCh. 32.4 - Prob. 1CCCh. 32.4 - WHAT IF? Suppose ctenophores are basal metazoans...
Ch. 32.4 - Prob. 3CCCh. 32 - Prob. 32.1CRCh. 32 - What caused ihe Cambrian exploston? Describe...Ch. 32 - Describe how body plans provide useful Information...Ch. 32 - Prob. 32.4CRCh. 32 - Prob. 1TYUCh. 32 - The distinction between sponges and other animal...Ch. 32 - Prob. 3TYUCh. 32 - Prob. 4TYUCh. 32 - EVOLUTION CONNECTION A professor begins a lecture...Ch. 32 - SCIENTIFIC INQUIRY INTERPRET THE DATA Redraw the...Ch. 32 - WRITE ABOUT A THEME: INTERACTIONS Animal life...Ch. 32 - SYNTHESIZE YOUR KNOWLEDGE This organism is an...
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- Test Your Understanding 11.EVOLUTION LINK Discuss the relationships among the echinoderms and chordates, describing shared derived characters that support grouping these animals as deuterostomes.arrow_forwardTest Your Understanding 8.VISUALIZE Draw a simple cladogram illustrating the evolutionary relationships among extant mammals (marsupials, eutherians, and monotremes). Include the following characters in your cladogram: well-developed placenta, vivipary, endothermy, marsupium, hair.arrow_forwardAnswer according to phylogenetic tree for animal phyla 1. Which phyla are radically symmetrical? 2. Which phyla are coelomates? 3. Which phyla are triploblastic? Explain what triplobastic means. 4. Which phyla have segmented bodies and a closed blood system? 5. a) Differentiate between an exoskeleton and endoskeleton. b) Which phyla have these skeletons? c) Give one advantage and disadvantage of each of this skeletons 6. Which phylum did not hive rise to any other group of animals? 7. Name one feature of the chordates that make them different from the other phyla 8. What was the common ancestor of all animals?arrow_forward
- MAKE CONNECTIONS Explain how the molluscanfoot in gastropods and the excurrent siphon incephalopods represent examples of descent withmodification (see Concept 22.2).arrow_forward. WHAT IF? Suppose ctenophores are basal metazoansand sponges are the sister group of all remaining animals.Under this hypothesis, redraw Figure 32.11 and discusswhether animals with tissues would form a clade.arrow_forwardTest Your Understanding 2.Which of the following is/are found in tunicates? (a) dorsal, tubular nerve cord (b) tube feet (c) anal gill slits (d) two pairs of appendages (e) vertebral columnarrow_forward
- Draw a see cucumber and label the major features visible on the animal. In particular, locate the tube feet.1. How does the arrangement of tube feet on a cucumber compare to that of a sea star? To an urchin?2. Based on the arrangement of tube feet, would you propose that cucumbers are more closely related to sea star or urchins, evolutionarily speaking.?arrow_forwardQ5. Lungs allow an animal to breathe _____________. Why did this adaptation evolve? Q6. Tetrapods use ____________ to breathe. Do any modern tetrapods have gills? Explain. Q7. How did the anatomy of the shoulder and head change during tetrapod evolution? Q8. Acanthostega and Icythyostega have been called fish-like tetrapods. Explain why they are described as such and describe the environment in which they probably lived. Q9. __________________ and _____________________ are early tetrapods that do not have features unique to fish. Describe how these two species differ anatomically and what that means about where they each lived.arrow_forwardWHAT IF? If the most recent common ancestor of Tulerpeton and living tetrapods originated 370 millionyears ago, what range of dates would include the origin of amphibians?arrow_forward
- Q17: what is the correct answer The animals above are members of which taxa? Group of answer choices A. Deutersotomia, Hemichordata B. Deutersotomia, Chordata C. Protostomia, Mollusca D. Deuterostomia, Echinodermataarrow_forwardTest Your Understanding 1.Which of the following is not a shared derived character of echinoderms? (a) water vascular system (b) notochord (c) tube feet (d) pentaradial symmetry in adult (e) endoskeleton of calcium carbonate plates and spinesarrow_forwardTest Your Understanding 9.EVOLUTION LINK Sea urchins have radial symmetry. Explain why they are not classified as cnidarians.arrow_forward
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