Which one of the following statements comparing the hydrozoans Hydra and Obelia is false?
A)Unlike Hydra,Obelia and most hydrozoans are colonial.
B)Unlike Hydra,Obelia and most hydrozoans are marine.
C)In Hydra,the medusa stage is more conspicuous than the polyp stage;the reverse is true for Obelia.
D)The polyps and medusae of both Hydra and Obelia have gastrovascular cavities.
E)Both Hydra and Obelia have cnidocytes.

Question

Quizplus · Accepted Answer

The statement "In Hydra, the medusa stage is more conspicuous than the polyp stage; the reverse is true for Obelia" is false. In Hydra, the polyp stage is more conspicuous and the medusa stage is typically absent. In Obelia, the medusa stage is more conspicuous and the polyp stage forms part of the colony.

Which One of the Following Statements Comparing the Hydrozoans Hydra