Loose Leaf For Integrated Principles Of Zoology
18th Edition
ISBN: 9781260411140
Author: Cleveland P Hickman Jr. Emeritus, Susan L. Keen, David J Eisenhour Professor PhD, Allan Larson, Helen I'Anson Associate Professor of Biology
Publisher: McGraw-Hill Education
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Chapter 14, Problem 24RQ
Summary Introduction
To determine: The characters of acanthocephalans that are phylogenetically similar to the rotifers.
Introduction: Exocytosis is the process in which the waste material is removed from the cell into the extracellular matrix, which forms secretory vesicles that migrate to the plasma membrane surface from inside the cell and then eliminates the products out from the cell. This is used by the digestive gland to secrete enzymes.
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The evolutionary ancestry of acanthocephalans is particularly obscure. Describe some characters of acanthocephalans that make it surprising that they could be highly derived rotifers.
Describe and contrast the tegument of most turbellarians and the other classes ofPlatyhelminthes. Does the tegument provide evidence that trematodes,monogeneans, and cestodes form a clade within Platyhelminthes? Why?
Rotifers and acanthocephalans previously belonged to separate phylum. But recent molecular studies and genome analysis show that acanthocephalans are sister groups of a class under Phylum Rotifera. And thus, the two should belong to a single taxon. Aside from the molecular evidences, what morphological and physiological features of both the rotifers and acanthocephalans support this claim? Explain your answer.
Chapter 14 Solutions
Loose Leaf For Integrated Principles Of Zoology
Ch. 14 - Prob. 1RQCh. 14 - Prob. 2RQCh. 14 - Match the terms in the right column with the...Ch. 14 - Describe the body plan of a typical turbellarian.Ch. 14 - Prob. 5RQCh. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Prob. 8RQCh. 14 - Prob. 9RQCh. 14 - Describe and contrast the tegument of most...
Ch. 14 - Prob. 11RQCh. 14 - Why is Taenia solium a more dangerous infection...Ch. 14 - Prob. 13RQCh. 14 - Define each of the following with reference to...Ch. 14 - Prob. 15RQCh. 14 - Prob. 16RQCh. 14 - What character unites members of clade Gnathifera?Ch. 14 - Prob. 18RQCh. 14 - What habitat is shared by micrognathozoans and...Ch. 14 - what is the normal size of a rotifer, where is it...Ch. 14 - Explain the difference between mictic and amictic...Ch. 14 - What is eutely?Ch. 14 - Prob. 23RQCh. 14 - Prob. 24RQCh. 14 - Prob. 25RQCh. 14 - Prob. 26RQCh. 14 - How could an endoparasite evolve from a...
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- Describe and contrast the tegument of most turbellarians and the other classes of platyhelminths. Does the tegument provide evidence that trematodes, monogeneans, and cestodes form a clade within Platyhelminthes? Why?arrow_forwardIdentify and label the parts of the following specimens of Phylum Platyhelminthes:arrow_forwardDescribe characteristics of phylum Platyhelminthes and its subgroups by discussing similarities and differences of 1)Morphological and anatomical features 2) life Styles 3)lifecycles and modes of reproduction of Turbellarians,trematodes and cestodesarrow_forward
- What structures are found in Acanthocephalans which allows them to perform its endoparasitic life? Explainarrow_forward1. Compare and contrast an Acanthocephalan and a Rotifer by providing 5 points of comparison. Point of comparison Rotifer Acanthocephalan 1. 2. 3. 4. 5. 2. What structures are found in Acanthocephalans which allows them to perform its endoparasitic life? Explainarrow_forwardCyclostomes are often thought as of as “primitive” because they lack jaws. In what ways could the heads of cyclostomes be considered to be derived in their own way?arrow_forward
- Compare the whole specimens and cross-sections of Ascaris and Dugesia. How would you differentiate these worms? Also, nematodes have a complete gut whereas most platyhelminths have an incomplete one. Think of one advantage of having a complete gut.arrow_forwardReptilia, aves and Chordata share major similarities, list at least 6 of them.arrow_forwardFor the phylum Gastrotricha please provide: - -- General biology. Approximately how large is the phylum? What do they look like? In what types of environments are they found? What do they eat? Do they have any unique body structures? --Phylum features. Protostome vs deuterostome vs?? Type of digestive system, circulation, respiration, mode of reproduction (note some of these structures may be absent or not known in which case say that don’t just leave them out). --Phylogenetic position. What other phyla are close relatives? What features do they share? Show recently accepted phylogeny.arrow_forward
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