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 16, Problem 4RQ
Briefly describe characteristics of the hypothetical ancestral mollusc, and tell how each class of molluscs (Caudofoveata, Solenogastres, Polyplacophora, Monoplacophora, Gastropoda, Cephalopoda, Bivalvia, Scaphopoda) differs from the ancestral condition with respect to each of the following: shell, radula, foot, mantle cavity and gills, circulatory system, and head.
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Chapter 16 Solutions
Loose Leaf For Integrated Principles Of Zoology
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- Develop a dichotomous key to the CLASSES of Phylum MOLLUSCA: Polyplacophora, Bivalvia, Gastropoda, Cephalopodaarrow_forwardGive TWO BASIC (essential to an organism’s survival, i.e. without these, existence is not possible) structures of the Phylum Mollusca. Give FOUR TYPICAL (distinguishing features) structures of the Phylum Mollusca.arrow_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
- Briefly describe the distinguishing morphological features of each of the following: eurypterids, horseshoe crabs, pycnogonids.arrow_forwardFor Phylum Mollusca, Class Cephalopod 1. Organ/system characteristics. Answer the following for each organism:a. How is their circulatory system? b. Excretory/osmoregulation: How does the organism eliminate waste? What organs do they use?c. Skeleton/support: List the structures or ways this organism supports itself. 2. Ecology. Describe/answer the following for each organism:a. Does it have a complete or incomplete digestive system? How does this animal feed?b. Identify any unique feeding structure• Be sure to use the correct terms to identify any unique feeding structure(s) used by theanimal.arrow_forwarda) List down subclasses of Gastropoda b) Snails are distinguished by an anatomical process known as where the visceral mass of the animals rotates 180° to one side during the development. c) acts as a trapdoor to close the shell. d) How many tentacles do the land snails have? e) What is the function of radula?arrow_forward
- In the different lineages of molluscs, it is easy to understand the variations from the basic organizational plan in relation to the lifestyles of the organisms. For example, the clam is a buried living organism that feeds by filtration and the cuttlefish is a free predatory organism. The organization of Lamellibranchs and Cephalopods can then be related to these lifestyles.Based on the texts provided, the various illustrations and your knowledge, indicate in a short text :Adaptations to filtration in clams (and by extension in lamellibranchs)arrow_forwardFor phylum Mollusca, Class Cephalopod 1. Characteristics. List whether the organism is:a. Diploblastic or triploblastic (if applicable) b. Deuterostome or protostome (if applicable) c. Coelomate, pseudocoelomate or eucoelomate (if applicable) 2. Organ/system characteristics. Answer the following for each organism:a. How is their circulatory system? b. Excretory/osmoregulation: How does the organism eliminate waste? What organs do they use? 3. Ecology. Describe/answer the following for each organism:a. Does it have a complete or incomplete digestive system? How does this animal feed?b. Identify any unique feeding structure• Be sure to use the correct terms to identify any unique feeding structure(s) used by the animal.arrow_forwardWhich other invertebrate groups are likely to be the closest relatives of molluscs? What evidence supports and contradicts these relationships?arrow_forward
- Define the following with respect to gastropods: operculum, torsion, fouling, bilateral asymmetry, rhinophore, pneumostomearrow_forwardCreate a body plan table (Insert → Add Table) for the following animal phyla: Porifera, Cnidaria, Platyhelminthes, Mollusca, Annelida, Nematoda, Arthropoda, Echinodermata, and Chordata. Describe each phylum by identifying the following body plan features. 1) Symmetry: Asymmetrical, Radial, or Bilateral 2) Tissue type: Parazoa, Eumetazoa (diploblastic), or Eumetazoa (triploblastic) 3) Body cavity (if triploblastic): Acoelomate, Psuedocoelomate, or Coelomate 4) Developmental mode (if Coelomate): Protostome or Dueuterostome Note: Depending on the body plan, features 3 & 4 may not apply to specific phyla. * Please answer 1) and 2) only. Reposting question for other two to be answered.arrow_forwardWhich other invertebrate groups are likely to be the closest relatives of molluscs? What evidence supports and contradicts these relationships? *textbookarrow_forward
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