Question #9a334

1 Answer
Dr Birendra Kumar Mishra
Nov 14, 2016

Armed body.

Explanation:

  1. The characteristics features of the Phylum Echinoderms are radial symmetrical body, several arms radiating from a centre of the body. The body consists of five equal segments (pentamerous), each containing a duplicate set of various internal organs.
  2. They are strictly marine.
    Thank You.
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