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Spines: Murex, and other surface crawling snails, live on loose, sandy substrate s which provide no firm attachment for the animals. As a result, they cannot rely on strength of attachment to prevent being overturned or grabbed by predators. Structures other than those associated with the foot must act in this defensive role. To examine this question, place the Murex shell on the lab table with the aperture down. This is the normal life position of these snails. Where does the shell actually touch the table? Would the shells be harder or easier to roll or overturn if they had no spines? Would they be harder or easier to swallow without spines? Based on these observations, what do you think is the function of the spines in M11rex 7

Spines: Murex, and other surface crawling snails, live on loose, sandy substrate s which provide no firm attachment for the animals. As a result, they cannot rely on strength of attachment to prevent being overturned or grabbed by predators. Structures other than those associated with the foot must act in this defensive role. To examine this question, place the Murex shell on the lab table with the aperture down. This is the normal life position of these snails. Where does the shell actually touch the table? Would the shells be harder or easier to roll or overturn if they had no spines? Would they be harder or easier to swallow without spines? Based on these observations, what do you think is the function of the spines in M11rex 7

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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Spines: Murex, and other surface crawling snails, live on loose, sandy substrate s which provide no firm attachment for the animals. As a result, they cannot rely on strength of attachment to prevent being overturned or grabbed by predators. Structures other than those associated with the foot must act in this defensive role. To examine this question, place the Murex shell on the lab table with the aperture down. This is the normal life position of these snails. Where does the shell actually touch the table? Would the shells be harder or easier to roll or overturn if they had no spines? Would they be harder or casier to swallow without spines? Based on these observations, what do you think is the function of the spines in MIlrex 7 168
Transcribed Image Text:Spines: Murex, and other surface crawling snails, live on loose, sandy substrate s which provide no firm attachment for the animals. As a result, they cannot rely on strength of attachment to prevent being overturned or grabbed by predators. Structures other than those associated with the foot must act in this defensive role. To examine this question, place the Murex shell on the lab table with the aperture down. This is the normal life position of these snails. Where does the shell actually touch the table? Would the shells be harder or easier to roll or overturn if they had no spines? Would they be harder or casier to swallow without spines? Based on these observations, what do you think is the function of the spines in MIlrex 7 168
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