Question: 7. Among protostomes, which morphological trait has shown the most variation? a. type of symmetry (bilateral vs. radial vs. none) b. type of body

7. Among protostomes, which morphological trait has shown the most variation? a. type of symmetry (bilateral vs. radial vs. none) b. type of body cavity (coelom vs. pseudocoelom vs. no coelom) c. number of embryonic tissue types (diploblasty vs. triploblasty) d. type of skeleton (exoskeleton vs. endoskeleton vs. hydrostatic)

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