Comparative biology and morphology of invertebrates. Laboratory work emphasizes structures and functions. Emphasizes annelids and related worms, mollusks, and arthropods. Cannot be taken if credit received for either FHL 430/BIOL 430 or FHL 432/BIOL 432. Prerequisite: either BIOL 220, BIOL 240, B BIO 220, or T BIOL 140.