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Question
Biology
Ambulacral grooves are absent in the living forms of the class
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Q. Ambulacral grooves are absent in the living forms of the class
Punjab PMET
Punjab PMET 1999
A
Crinoidea
B
Ophiuroidea
C
Asteroidea
D
Echinodermata
Solution:
Ambulacral grooves are found in the arms of Echinoderms lined by tube feet. It is absent in Ophiuroidea which are covered by ossicles.