Which of the following lineages of Cnidarians have both polyp and medusa stages in their life cycles-with the polyp stage typically forming a colony-and includes species of Obelia?

Question

Quizplus · Accepted Answer

Hydrozoa is the correct answer because this lineage of Cnidarians typically has both polyp and medusa stages in their life cycles, with the polyp stage often forming colonies. Species of Obelia are included in this group, distinguishing it from the other options listed.

Which of the Following Lineages of Cnidarians Have Both Polyp