Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 33, Problem 33.3CR
is the lophotrochozoan clade united by unique morphological features shared by all of its members? Explain.
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Chapter 33 Solutions
Campbell Biology
Ch. 33.1 - Prob. 1CCCh. 33.1 - Prob. 2CCCh. 33.2 - Compare and contrast the polyp and medusa forms of...Ch. 33.2 - VISUAL SKILLS Use the cnidarian life cycle...Ch. 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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- Class 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_forwardAs we have discussed in class, phylogenies are hypotheses, and can therefore change over time with new evidence. Relatively recent and strong molecular evidence (that we did not discuss in class) suggests that all members of the Subphylum Hexapoda are derived from a common ancestor within the Subphylum Crustacea, as in the cladogram shown below. Given this new information, answer the question below. Note: Don't panic. Some of the names of these groups are new to you (Copepoda, Malacostraca, and Remipedia are all classes or subclasses within the Subphylum Crustacea), but this will not affect your ability to answer this question. Myriapoda Copepoda (Crustacea) Malacostraca (Crustacea) Hexapoda Remipedia (Crustacea) If we insisted that all groups must be categorized and named so that taxonomic ranks/names always include a single common ancestor and all of its descendants, how would this new evidence change our definition of a hexapod? Hexapoda and Melacostraca would have to be classified…arrow_forwardThe protostome developmental sequence arose just once in evolutionary history, resulting in two main subgroups–Lophotrochozoa and Ecdysozoa. What does this finding suggest? Group of answer choices The lophotrochozoans are monophyletic. The protostomes are a paraphyletic group. Division of these two groups occurred after the protostome developmental sequence appeared. These two subgroups have a common ancestor that was a deuterostome.arrow_forward
- What features make placozoans interesting from a phylogenetic perspective?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_forwardMatch the following groups under Phylum annelida to the following characters: Match each item to a choice: Branchiobdellida Hirudenea Acanthobdellida Oligochaeta Polychaeta Choices: : Loss of remaining setae; 34 metameres : Anterior body sucker; 15 metameres : Presence of clitellum; but without superficial annuli E Posterior body sucker; 30 metameres : Parapodia; complex headarrow_forward
- Describe a Phylum Porifera organism as: Parazoa or Eumetazoa Diploblastic or Triploblastic or neither Assymetrical or Radial Symmetrical or Bilaterially Symmetrical Aquatic or Terrestrial Acoelomate or Pseudocoelomate or Coelomate Protostome or Deuterostome or Neither Lophotrochozan or Ecdysosoan or Neitherarrow_forwardWhat is unique about the madreporite of sea cucumbers (class Holothuroidea)?arrow_forwardKingdom: Animalia Phylum: Chordata Order: Dipnoi Suborder: Ceratodontoidei Family: Neoceratodontidae Genus: Neoceratodus Species: N. forsteri The Queensland lungfish is part of these taxa. Which species is most closely related to this species?arrow_forward
- Please complete the following (abbreviated) cladogram of Metazoa, labeling tips, nodes and synapomorphies by using the following word bank: Choanoflagellates multicellularity triploblasty Arthropoda Lepidosauria Cnidaria Bilateria Deuterostomia Ecdysozoa radial cleavage Porifera Mammalia Nematoda 2. Use the tree above to answer the following questions: Name the monophyletic group that is most closely related to Deuterostomia. b. Circle the monophyletic group Animalia (Metazoa). Circle the MRCA of Nematoda and Choanoflagellates. d. Write another name (many possibilities, not listed in the word bank) for the MRCA of Mammalia and Lepidosauria, a. C. 工arrow_forwardDefine "synapomorphy" and "symplesiomorphy". Which nine phyla were placed in the old "Phylum" Aschelminthes? What characters did these share? Were these synapomorphies or sympleisomorphies? Which phyla are now placed in the Gnathifera? What synapomorphy(ies) do they share?arrow_forwardLabel lines on right by Supergroup: E = Excavata; Am = Amoebozoa; C = Chromalveolata; Ar= Archaeplastida %3Darrow_forward
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