digestive system
water vascular system
canal system
none of these
C. canal system
sea-hares
sea-stars
devil fish
sea fans
Ophiothrix
Pentaceros
Antedon
None of these
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
excretion
absorption
reproduction
respiration
Sea hares
Brittle stars
Star fishes
Sea fish
torneria
onchosphere
trochophore
bipinnaria
parapodia
pseudopodia
setae
tube feet
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
Sea cucumber
Sea lily
Sea urchin
Sea star
sand dollar
sea cucumber
sea flies
sea horse
Asterias
Antedon
Echinus
Ophiothrix
herbivorous
omnivorous
carnivorous
none of these
Sea star
sea urchin
Sea cucumber
Feather star
digestive system
water vascular system
canal system
none of these
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
bipinnaria
glochidium
auralia
echinus
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
Star fish
Sea fan
Ship worm
None of these
pluteus
echinopluteus
bipinnaria
auricularia
tube feet
lobopodia
cephalopodia
rhizopodia
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
echinodea
holothuroidea
asteroidea
ophiuroidea
haemal system
digestive system
ambulacral system
reproductive system
Sand dollar
Jelly fish
Silver fish
All of these
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
movable
immovable
prehensile
all of these
Antedon
Echinocardium
Ophiothrix
Pentaceros
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these