1. Tardigrade
  2. Question
  3. Biology
  4. Obelia is characterised by A. Ciliated free swimming planula larva B. Metagenesis C. Acraspedote medusa D. Statocysts present in medusoid stage

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Q. Obelia is characterised by
A. Ciliated free swimming planula larva
B. Metagenesis
C. Acraspedote medusa
D. Statocysts present in medusoid stage

Animal Kingdom

Solution:

Obelia (sea fur) belong to class hydrozoa, phylum cnidaria. After fertilization in Obelia ciliated free swimming larva-planula is formed. Obelia show alternation of generations or metagenesis. Medusae are sexual forms and bear true velum, marked by narrow they like ridge. Such medusa are called craspedote medusae.