echinodea
holothuroidea
asteroidea
ophiuroidea
B. holothuroidea
Sea star
sea urchin
Sea cucumber
Feather star
Star fish
Sea fan
Ship worm
None of these
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
parapodia
pseudopodia
setae
tube feet
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
sea-hares
sea-stars
devil fish
sea fans
pluteus
echinopluteus
bipinnaria
auricularia
Sea-star
Star fish
Sea-cucumber
Sea lily
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
haemal system
digestive system
ambulacral system
reproductive system
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
ctenidia
dermal branchiae
book lungs
trachea
spines
tube feet
integumentary structures
none of these
torneria
onchosphere
trochophore
bipinnaria
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
coelenterates
polychaetes
echinodermates
hemichordates
tube feet
lobopodia
cephalopodia
rhizopodia
Sand dollar
Jelly fish
Silver fish
All of these
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
digestive system
water vascular system
canal system
none of these
Snail
Slug
Nereis
Sea-urchin
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
bipinnaria
glochidium
auralia
echinus
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
excretion
absorption
reproduction
respiration
Sea hares
Brittle stars
Star fishes
Sea fish
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
movable
immovable
prehensile
all of these