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The phylum Echinodermata has several synapomorphies, but each subgroup modifies these synapomorphies and thus it is...

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Biology

The phylum Echinodermata has several synapomorphies, but eachsubgroup modifies these synapomorphies and thus it is difficult torelate these groups.

a) List three synapomorphies for the phylum Echinodermata.

b) For each of the synapomorphies you list, how do you expectthose features to differ between the asteroids andholothuroids?

c) For the phylum Echinodermata, which class do you think ismost similar? Why?

d) What phyla were the Echinodermata historically confused with,and why? Which do they most relate to and how is this known?

Answer & Explanation Solved by verified expert
4.2 Ratings (740 Votes)
Solution A The echinoderm or spinyskinned animals represent a group of marine invertebrates The important synapomorphies exhibited by echinoderms are 1 Radial symmetry 2 Presence of calcium rich ossicle plates and 3 Well developed and unique water vascular system These ar the important three synapomorphies for the phylum Echinodermata    See Answer
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