http://digfir-published.macmillanusa.com/life11e/life11e_ch31_1.htmlChapter Introduction57bc610b757a2efa44000000
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_2.htmlkey concept 31.1 Protostomes Account for More Than Half of All Described Species
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_3.htmlCilia-bearing lophophores and trochophores evolved among the lophotrochozoans
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_4.htmlEcdysozoans must shed their cuticles
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_5.htmlArrow worms retain some ancestral developmental features
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_7.htmlkey concept 31.2 Many Lophotrochozoans Have Ciliated Feeding Structures or Life Stages
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_8.htmlMost bryozoans and entoprocts live in colonies
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_9.htmlFlatworms, rotifers, and gastrotrichs are structurally diverse relatives
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_10.htmlRibbon worms have a long, protrusible feeding organ
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_11.htmlBrachiopods and phoronids use lophophores to extract food from the water
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_12.htmlAnnelids have segmented bodies
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_13.htmlMollusks have undergone a dramatic evolutionary radiation
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_15.htmlkey concept 31.3 Ecdysozoans Grow by Shedding Their Cuticles
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_16.htmlSeveral marine ecdysozoan groups have relatively few species
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_17.htmlNematodes and their relatives are abundant and diverse
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_19.htmlkey concept 31.4 Arthropods Are the Most Abundant and Diverse Group of Animals
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_20.htmlArthropod relatives have fleshy, unjointed appendages
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_21.htmlJointed appendages appeared in the trilobites
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_22.htmlChelicerates have pointed, nonchewing mouthparts
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_23.htmlMandibles and antennae characterize the remaining arthropod groups
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_24.htmlMore than half of all described species are insects
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_26.htmlKey Features of Protostome Evolution
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_27.htmlInvestigating Life57bc610b757a2efa44000000
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_28.htmlChapter Summary
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http://digfir-published.macmillanusa.com/life11e/life11e_ch31_29.html Apply What Youâve Learned
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