Sea star
sea urchin
Sea cucumber
Feather star
D. Feather star
Asterias
Antedon
Echinus
Ophiothrix
Sea hares
Brittle stars
Star fishes
Sea fish
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
haemal system
digestive system
ambulacral system
reproductive system
torneria
onchosphere
trochophore
bipinnaria
sand dollar
sea cucumber
sea flies
sea horse
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
locomotion
respiration
feeding
all of these
Antedon
Echinocardium
Ophiothrix
Pentaceros
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
tube feet
lobopodia
cephalopodia
rhizopodia
Star fish
Sea fan
Ship worm
None of these
Sand dollar
Jelly fish
Silver fish
All of these
excretion
absorption
reproduction
respiration
movable
immovable
prehensile
all of these
echinodea
holothuroidea
asteroidea
ophiuroidea
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
ctenidia
dermal branchiae
book lungs
trachea
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
herbivorous
omnivorous
carnivorous
none of these
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Ophiothrix
Pentaceros
Antedon
None of these
spines
tube feet
integumentary structures
none of these
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
pluteus
echinopluteus
bipinnaria
auricularia
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ