torneria
onchosphere
trochophore
bipinnaria
D. bipinnaria
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
Star fish
Sea fan
Ship worm
None of these
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
Antedon
Echinocardium
Ophiothrix
Pentaceros
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
coelenterates
marine arthropods
echinodermates
sponges
herbivorous
omnivorous
carnivorous
none of these
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
spines
tube feet
integumentary structures
none of these
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
movable
immovable
prehensile
all of these
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
pluteus
echinopluteus
bipinnaria
auricularia
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Sea star
sea urchin
Sea cucumber
Feather star
echinodea
holothuroidea
asteroidea
ophiuroidea
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
digestive system
water vascular system
canal system
none of these
bipinnaria
glochidium
auralia
echinus
locomotion
respiration
feeding
all of these
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
tube feet
lobopodia
cephalopodia
rhizopodia
Asterias
Antedon
Echinus
Ophiothrix
haemal system
digestive system
ambulacral system
reproductive system
Sea cucumber
Sea lily
Sea urchin
Sea star
ctenidia
dermal branchiae
book lungs
trachea