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Question

What are zooids in cnidaria?


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Solution

Cnidaria:

  1. Cnidaria are cnidoblasts or cnidocytes.
  2. Cnidaria are the stinging cells used for anchorage, defense and capture of the prey.
  3. Cnidaria are found on the tentacles as well as the body of members of Cnidaria.

Zooids:

  1. Cnidaria produce colonies composed of polyp-like zooids.
  2. Zooids help in defense, reproduction and catching of prey.
  3. Example: In Obelia, gastrozooids are capable of asexual reproduction and gonozooids are sexually reproducing.

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