Question
Biology Question on Kingdom Animalia
Ambulacral grooves are absent in the living forms of the Class
A
Crinoidea
B
Asteroidea
C
Ophiuroidea
D
Echinodermata
Answer
Ophiuroidea
Explanation
Solution
Ambulacral grooves are found in the arms of echinoderms lined by tube feet. Ambulacral grooves are absent in Ophiuroidea which are covered by ossicles.