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English, 20.10.2019 00:30, makaylahunt

In addition to radial symmetry, echinoderms have a water-vascular system. true or false

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Biology, 23.08.2019 21:00, Nerdylearner8639

What does evidence show about radial symmetry in invertebrates? a. all invertebrates with radial symmetry are closely related b. radial symmetry was the very first invertebrate body pattern c. radial symmetry in invertebrates disappeared millions of years ago d. radial symmetry evolved at least twice in unrelated invertebrates groups

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Biology, 26.09.2019 10:20, blake12345v

Which of these is true of echinoderms a. they have heads. b. they have radial symmetry. c. they have shells. d. they have smooth skin.

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Biology, 08.10.2019 20:40, ansley81

Which of the following combinations correctly matches a phylum to its description? a. echinodermata - bilateral symmetry as a larva, water vascular system b. nematoda - segmented worms, closed circulatory c. cnidaria - flatworms, gastrovascular cavity, acoelomate d. platyhelminthes - radial symmetry, polyp and medusa body forms

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Biology, 16.10.2019 00:00, zaymuney3063

Interestingly, echinoderms (sea stars and sea urchins) have three germ layers yet they display radial symmetry as adults rather than bilateral symmetry. it has been suggested that their immediate ancestors must have been bilaterally symmetrical and evolved radial symmetry. how can this be explained?

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