Which of the following combinations correctly matches a phylum to its description?
A) Echinodermata-bilateral symmetry as a larva, water vascular system
B) Nematoda-segmented worms, closed circulatory system
C) Cnidaria-flatworms, gastrovascular cavity, acoelomate
D) Platyhelminthes-radial symmetry, polyp and medusa body forms

Question

Quizplus · Accepted Answer

Echinodermata are characterized by their bilateral symmetry as a larva and possession of a water vascular system, which helps them in movement and feeding. Nematoda are roundworms and are not segmented, and do not possess a closed circulatory system. Cnidaria are characterized by their presence of a gastrovascular cavity and radial symmetry, and are not flatworms or acoelomate. Platyhelminthes are characterized by their presence of a flattened body, but they exhibit bilateral symmetry and do not have polyp and medusa body forms.

Which of the Following Combinations Correctly Matches a Phylum to Its