Your job is to classify a newly discovered animal species. Your initial studies reveal that your specimen has tissues, organs, a head, and a pseudocoelom; has no segmentation; and has bilateral symmetry. To what phylum does this animal belong?

Question

Quizplus · Accepted Answer

The animal has a pseudocoelom and bilateral symmetry, which are characteristics of the phylum Nematoda. It lacks segmentation, which rules out Annelida, and it has a pseudocoelom, which rules out Platyhelminthes and Mollusca. Cnidaria is incorrect as they have radial symmetry.

Your Job Is to Classify a Newly Discovered Animal Species