Biology Illinois Edition (Glencoe Science)
7th Edition
ISBN: 9780078759864
Author: Alton Biggs
Publisher: MCG
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Chapter 27, Problem 15A
Summary Introduction
To write: The reason for some sea urchins to seem to have relatively long lifespans.
Introduction: Echinoderms are deuterostomes which represent a significant transition in animal phylogeny. Echinoderms are aquatic mammals, and are the only species to have a deuterostome development and an endoskeleton in evolutionary history.
Expert Solution & Answer
Explanation of Solution
Sea urchins burrow into rocky surroundings. In the test, the tube feet spread through pores. Sea urchins do not have arms, but their test represents the five-part pattern of arms in starfish and starfish. Any spines of sea urchins and pedicellariae carry venom and are used to fight off predators. The poison will paralyze prey in pedicellariae.
Conclusion
Thus, it concludes that sea urchins have spines used to fend off predators which will paralyze prey.
Chapter 27 Solutions
Biology Illinois Edition (Glencoe Science)
Ch. 27 - Prob. 1ACh. 27 - Prob. 2ACh. 27 - Prob. 3ACh. 27 - Prob. 4ACh. 27 - Prob. 5ACh. 27 - Prob. 6ACh. 27 - Prob. 7ACh. 27 - Prob. 8ACh. 27 - Prob. 9ACh. 27 - Prob. 10A
Ch. 27 - Prob. 11ACh. 27 - Prob. 12ACh. 27 - Prob. 13ACh. 27 - Prob. 14ACh. 27 - Prob. 15ACh. 27 - Prob. 16ACh. 27 - Prob. 17ACh. 27 - Prob. 18ACh. 27 - Prob. 19ACh. 27 - Prob. 20ACh. 27 - Prob. 21ACh. 27 - Prob. 22ACh. 27 - Prob. 23ACh. 27 - Prob. 24ACh. 27 - Prob. 25ACh. 27 - Prob. 26ACh. 27 - Prob. 27ACh. 27 - Prob. 28ACh. 27 - Prob. 29ACh. 27 - Prob. 30ACh. 27 - Prob. 31ACh. 27 - Prob. 32ACh. 27 - Prob. 33ACh. 27 - Prob. 34ACh. 27 - Prob. 35ACh. 27 - Prob. 36ACh. 27 - Prob. 37ACh. 27 - Prob. 38ACh. 27 - Prob. 39ACh. 27 - Prob. 40ACh. 27 - Prob. 41ACh. 27 - Prob. 42ACh. 27 - Prob. 1STPCh. 27 - Prob. 2STPCh. 27 - Prob. 3STPCh. 27 - Prob. 4STPCh. 27 - Prob. 5STPCh. 27 - Prob. 6STPCh. 27 - Prob. 7STPCh. 27 - Prob. 8STPCh. 27 - Prob. 9STPCh. 27 - Prob. 10STPCh. 27 - Prob. 11STPCh. 27 - Prob. 12STPCh. 27 - Prob. 13STPCh. 27 - Prob. 14STPCh. 27 - Prob. 15STPCh. 27 - Prob. 16STPCh. 27 - Prob. 17STPCh. 27 - Prob. 18STPCh. 27 - Prob. 19STPCh. 27 - Prob. 20STP
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