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प्रश्न
Observe the figure and answer the questions given below.
a) To which phylum these organisms belong?
b) Name the substance with which their body is covered.
c) Name their organs of locomotion.
उत्तर
a) These organisms belongs to the phylum Echinodermata.
b) Their body is covered with calcareous spines and / or ossicles (plates).
c) They perform locomotion with the help of tube-feet.
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