Which One of the Following Statements Comparing the Hydrozoans Hydra

question 53

Multiple Choice

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.

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