1. In echinodermadata, sea urchins belong to class ______?
2. The 5 symmetrically spaced grooves in the body of a typical echinoderm is _____
1. In echinodermadata, sea urchins belong to class Echinoidea.
2. The 5 symmetrically spaced grooves in the body of a typical echinoderm is ambulacra.
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