Campbell Biology (10th Edition)
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 32.4, Problem 2CC

WHAT IF? Ø Suppose ctenophores are basal metazoans and sponges are the sister group of all remaining animals. Under this hypothesis, redraw Figure 32.11 and discuss whether animals with tissues would form a clade.

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Answer 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?
See attached. 1. Which pair of animals in numbers 1-3 belongs to a common ancestral group? Explain your answer.2. Fossils and anatomical records both provide pieces of evidence of evolution. How do you determine the age of fossils of an Aurorazhdarcho micronyx and an Archeopterix?
The phylogenetic tree in Exercise 1 above shows an outdated relationship between Brachiopoda, Bryozoa, and Mollusca.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 total
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