Ambulacral grooves are absent in the living forms of the class:

Question

Ambulacral grooves are absent in the living forms of the class: (A) Echinodermata (B) Crinoidea (C) Asteroidea (D) Ophiuroidca

Tardigrade Admin · Accepted Answer

Ambulacral grooves arise from the five corners of the peristome. These extend along the middle of the oral surface of each arm upto its tip. In Ophiuroidea these are absent

Q. Ambulacral grooves are absent in the living forms of the class:

Echinodermata

Crinoidea

Asteroidea

Ophiuroidca

Ambulacral grooves arise from the five corners of the peristome. These extend along the middle of the oral surface of each arm upto its tip. In Ophiuroidea these are absent