The shape of the cnidarian body that is adapted for swimming is: a. Mesoglea b. Polypoid c. Jellyfish d. Polyp The inner cavity of cnidarians is covered by a layer of cells a. Epithelial b. Mesogleals c. Gastrodermals d. Muscle epithelia In jellyfish, the mouth is at the end of: a. Gonangia b. Gastrovascular cavity c. Manubrium d. Veil The sexes are separated in some sea anemones, while others have individuals with both types of gonads. This last type is called: a. Asexual b. Diploid c. Monoecious d. Dioecious A life cycle that has two different body shapes is called: a. Anthropoloid b. Polymorphic c. Dimorphic polymorphic d. Endomorphic The strobila is a structure that occurs in the life cycle of class members: a. Hydrozoa b. Scyphozoa c. Cubozoa d. Anthozoa Some hydrozoans form floating colonies with various types of jellyfish and polyps. An example of this type of design is presented in members of the genre: a. Gonionemus b. Physalia c. Aurelia d. Thealia.