Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 33, Problem 5TYU
In Figure 33.2, which two main clades branch from the most recent common ancestor of the eumetazoans?
(A) Porifera and Cnidaria
(B) Lophotrochozoa and Ecdysozoa
(C) Cnidaria and Bilateria
(D) Deuterostomia and Bilateria
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Chapter 33 Solutions
Campbell Biology (10th Edition)
Ch. 33.1 - Prob. 1CCCh. 33.1 - Prob. 2CCCh. 33.2 - Compare and contrast the polyp and medusa forms of...Ch. 33.2 - Prob. 2CCCh. 33.2 - MAKE CONNECTIONS Many new animal body plans...Ch. 33.3 - Prob. 1CCCh. 33.3 - Prob. 2CCCh. 33.3 - MAKE CONNECTIONS Explain how the molluscan foot...Ch. 33.4 - Prob. 1CCCh. 33.4 - Describe two adaptations that have enabled insects...
Ch. 33.4 - MAKE CONNECTIONS Historically, annelids and...Ch. 33.5 - Prob. 1CCCh. 33.5 - WHAT IF? The insect Drosophila melanogaster and...Ch. 33.5 - MAKE CONNECTIONS Describe how the features and...Ch. 33 - Lacking tissues and organs, how do soonges...Ch. 33 - Describe the cnidarian body plan and its two major...Ch. 33 - is the lophotrochozoan clade united by unique...Ch. 33 - Describe some ecological roles of nematodes and...Ch. 33 - You've read that echinoderms and chordates are...Ch. 33 - A land snail, a clam and an octopus all share...Ch. 33 - Prob. 2TYUCh. 33 - The water vascular system of echinoderms (A)...Ch. 33 - Prob. 4TYUCh. 33 - In Figure 33.2, which two main clades branch from...Ch. 33 - Prob. 6TYUCh. 33 - Evolution connection Interpret thf data Draw a...Ch. 33 - Prob. 8TYUCh. 33 - Prob. 9TYUCh. 33 - SYNTHESIZE YOUR KNOWLEDGE Colleclively, do these...
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- The phylogenetic tree in Exercise 1 above shows an outdated relationship between Brachiopoda, Bryozoa, and Mollusca. We now know that: (1) Brachiopoda is more closely related to Mollusca; and (2) Bryozoa forms the sister-group to the clade formed by Brachiopoda+Mollusca. In the space below draw a phylogenetic tree showing the correct interrelationships among the 5 clades listed: Bryozoa: Brachiopoda: Linguliformea: Craniiformea: Rhynchonelliformea: Please include mollusca. Should be 6 classes totalarrow_forwardWhich phylum is characterized by animals thathave a segmented body?(A) Cnidaria(B) Platyhelminthes(C) Arthropoda(D) Molluscaarrow_forwardClass Gastropoda and Class Bivalvia independently evolved modifications to their body plan that allowed them to invade sandy and muddy habitats, burying their bodies under the surface and accessing the surface via siphons. For an example organism in each Class, (1) draw a diagram showing the morphological modifications and (2) write a description of how this organism had evolved from the hypothetical ancestral mollusk (HAM) body plan.arrow_forward
- Which of these models correctly identifies the most recent common ancestor diploblasts? Cnidaria Lophotrochozoa Ecdysozoa Deuterostomes Cnidaria Lophotrochozoa Ecdysozoa Deuterostomes Cnidaria -Lophotrochozoa Ecdysozoa Deuterostomes Cnidaria Lophotrochozoa Ecdysozoa Deuterostomesarrow_forwardThe distinction between sponges and other animal phyla is based mainly on the absence versus the presence of (A) a body cavity. (B) a complete digestive tract. (C) mesoderm. (D) tissues.arrow_forwardDownload 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?arrow_forward
- Suppose you discover a new species of animal that does not have body segments, but is triploblastic, coelomate, and cephalized. Under the molecular phylogenetic scheme, you would allocate it to which phylum? A)Platyhelminthes. B)Arthropoda. C)Nematoda. D)Mollusca. E)Echinodermata.arrow_forwardA previously unknown animal is being studied so that it can be classified. It is an invertebrate, triploblastic, dorsoventrally flattened, acoelomate, and has flame cells. Which phylum would you place it in? A)Arthropoda. B)Porifera C)Mollusca. D)Platyhelminthes. E)Cnidaria.arrow_forwardWhat structure differentiates Ectoprocts and Brachiopods from other Lophotrochozoa? Select one: 1-Complete digestive tract with two openings. 2- Fluid-filled coelom. 3- Triploblastic. 4- Suspension feeding via lophophore. 5- Trochophore larval stage. Please provide explanations in detail for the correct option as well as the incorrect options.arrow_forward
- What features make placozoans interesting from a phylogenetic perspective?arrow_forwardIf chaetognaths belong to Lophotrochozoa, they would be more closely related to animals like earthworms which have a trochophore larva. If they belong to Ecdysozoa, they would... A. Be more closely related to animals that have a lophophore feeding structure B. Be more closely related to animals that are diploblastic C. Be more closely related to animals without symmetry D. Be more closely related to animals that shed their outer cuticle E. Both B and D are true O A O B O C O D O Earrow_forwardcompare cnidarians to sponges and to the clade containing flatworms, mollusks, and annelids. What features are similar among these groups? What features are different?arrow_forward
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