Ophiothrix
Pentaceros
Antedon
None of these
D. None of these
Sea-star
Star fish
Sea-cucumber
Sea lily
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Ophiothrix
Pentaceros
Antedon
None of these
digestive system
water vascular system
canal system
none of these
torneria
onchosphere
trochophore
bipinnaria
Sea star
sea urchin
Sea cucumber
Feather star
A fresh water echinoderm
An ancient Greak ship lantern shaped structure connected with balancing system of seal lily
A masticatory apparatus connected with digestive system in sea urchin
A seive plate connected with ambulacral system in sea star
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Star fish
Sea fan
Ship worm
None of these
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
Sea cucumber
Sea lily
Sea urchin
Sea star
haemal system
digestive system
ambulacral system
reproductive system
locomotion
respiration
feeding
all of these
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
tube feet
lobopodia
cephalopodia
rhizopodia
echinodea
holothuroidea
asteroidea
ophiuroidea
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
excretion
absorption
reproduction
respiration
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
coelenterates
marine arthropods
echinodermates
sponges
coelenterates
polychaetes
echinodermates
hemichordates
pluteus
echinopluteus
bipinnaria
auricularia
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
parapodia
pseudopodia
setae
tube feet
movable
immovable
prehensile
all of these
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
bipinnaria
glochidium
auralia
echinus
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
spines
tube feet
integumentary structures
none of these