Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
C. Tube feet
Sand dollar
Jelly fish
Silver fish
All of these
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
haemal system
digestive system
ambulacral system
reproductive system
Antedon
Echinocardium
Ophiothrix
Pentaceros
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
sea-hares
sea-stars
devil fish
sea fans
digestive system
water vascular system
canal system
none of these
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
locomotion
respiration
feeding
all of these
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
Sea-star
Star fish
Sea-cucumber
Sea lily
tube feet
lobopodia
cephalopodia
rhizopodia
Ophiothrix
Pentaceros
Antedon
None of these
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
excretion
absorption
reproduction
respiration
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
spines
tube feet
integumentary structures
none of these
sand dollar
sea cucumber
sea flies
sea horse
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
coelenterates
marine arthropods
echinodermates
sponges
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
torneria
onchosphere
trochophore
bipinnaria
ctenidia
dermal branchiae
book lungs
trachea
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
Sea cucumber
Sea lily
Sea urchin
Sea star
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these