A nonciliated planula larva is characteristic of




Дата канвертавання26.04.2016
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Chapter 9

  1. A nonciliated planula larva is characteristic of

    1. Staurozoa.

    2. Hydrozoa.

    3. Cubozoa.

    4. Scyphozoa.



  1. In the life cycle of a scyphozoan, like Aurelia, budding of the polyp results in the formation of the

    1. planula.

    2. strobila.

    3. scyphistoma.

    4. ephyra.



  1. The relationships of the Ctenophora and the Cnidaria are made uncertain by the observation that

    1. ctenophores lack mesoglea.

    2. cnidarians are probably triploblastic rather than diploblastic.

    3. ctenophores are probably triploblastic rather than diploblastic.

    4. only cnidarians have a nerve net.



  1. Some members of the class __________, along with symbiotic zooxanthellae, participate in the formation of coral reefs.

    1. Hydrozoa

    2. Anthozoa

    3. Scyphozoa

    4. Cubozoa




  1. Members of which of the following pairs form a sister group united by reduced polyp, epidermal gamete forming cells, and rhopalia?

    1. Hydrozoa and Anthozoa

    2. Scyphozoa and Cubozoa

    3. Scyphozoa and Staurozoa

    4. Cubozoa and Anthozoa


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