Question

Which of the following do not have polyp form?

• A. Hydrozoa
• B. Scyphozoa
• C. Anthozoa
• D. All of the above

Answer 1

The correct option is B Scyphozoa

• The members of Cnidaria have two types of body forms, polyp, and medusa.
• The polyps have a cylindrical and elongated body and are fixed at a certain substrate.
• The medusa is the free-living form that is found swimming in the water.
• Hydrozoans are organisms that have polyp and medusa forms. They alternate between these forms, but the polyp form generally dominates. Organisms like Hydra spends its entire life as a polyp.
• In the case of Anthozoa, the individual is always a polyp.
• In Scyphozoa, the medusa stage is dominant and the polyp stage may be reduced or absent.

So, the correct answer is option B.