pluteus
echinopluteus
bipinnaria
auricularia
B. echinopluteus
ctenidia
dermal branchiae
book lungs
trachea
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
excretion
absorption
reproduction
respiration
parapodia
pseudopodia
setae
tube feet
Snail
Slug
Nereis
Sea-urchin
Sea star
sea urchin
Sea cucumber
Feather star
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
torneria
onchosphere
trochophore
bipinnaria
Sea-star
Star fish
Sea-cucumber
Sea lily
Star fish
Sea fan
Ship worm
None of these
sand dollar
sea cucumber
sea flies
sea horse
tube feet
lobopodia
cephalopodia
rhizopodia
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
pluteus
echinopluteus
bipinnaria
auricularia
sea-hares
sea-stars
devil fish
sea fans
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Sea hares
Brittle stars
Star fishes
Sea fish
Sand dollar
Jelly fish
Silver fish
All of these
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
coelenterates
marine arthropods
echinodermates
sponges
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
coelenterates
polychaetes
echinodermates
hemichordates
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
locomotion
respiration
feeding
all of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
echinodea
holothuroidea
asteroidea
ophiuroidea
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
herbivorous
omnivorous
carnivorous
none of these