Two of the orders of sea slugs are Nudibranchia and Anaspidea. What is true of sea slugs in these orders?

Nudibranchia and Anaspidea are both orders of sea slugs. In biological classification, different orders can belong to the same class; these sea slugs belong to the class Gastropoda. They are not in the same genus, and organisms in the same family are more closely related than organisms in different orders.

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