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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

The organism where the adult shows pentaradial symmetry, while the larval forms shows biradial symmetry is

Options

  1. AApis.
  2. BPleurobrachia.
  3. CAntedon.
  4. DAdamsia.

Correct answer

C. Antedon.

Step-by-step solution

Phylum Echinodermata: These animals have an endoskeleton of calcareous ossicles and, hence, the name Echinodermata (Spiny bodied). All are marine with organ-system level of organisation. The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical. Examples: Asterias (Star fish), Echinus (Sea urchin), Antedon (Sea lily), Cucumaria (Sea cucumber) and Ophiura (Brittle star).

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