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The ossicles are penetrated by a meshwork of spaces filled with fibers and dermal cells; the meshwork is _____________ and is unique to echinoderms.
Q15: Deuterostome characteristics<br>A) Mouth develops from or near
Q22: Of what evolutionary significance is the "hydrostatic
Q27: The extant group likely to be the
Q27: Which is NOT a correct association of
Q30: The _ is the layer on the
Q35: Larval and adult tunicates look virtually nothing
Q39: The region used for attachment of a
Q43: The stages in the life cycle of
Q47: The respiratory apparatus of a crayfish is<br>A)
Q64: Mammals began a dramatic expansion in the<br>A)