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Question

Ephyra is a stage in the life cycle of
  1. Physalia
  2. Obelia
  3. Aurelia
  4. Sea anemone


Solution

The correct option is C Aurelia
Ephyra is a larval stage in the life cycle of Aurelia or jelly fish. The planula larva of a jelly fish forms a fixed polyp-like stage called scyphistoma. Budding in Scyphistoma forms the ephyra larva. The process of the formation of ephyra is called strobilation. One scyphistoma forms several ephyra larvae.

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