parapodia
pseudopodia
setae
tube feet
D. tube feet
pluteus
echinopluteus
bipinnaria
auricularia
sand dollar
sea cucumber
sea flies
sea horse
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
tube feet
lobopodia
cephalopodia
rhizopodia
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
locomotion
respiration
feeding
all of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
coelenterates
polychaetes
echinodermates
hemichordates
Star fish
Sea fan
Ship worm
None 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
Sea cucumber
Sea lily
Sea urchin
Sea star
coelenterates
marine arthropods
echinodermates
sponges
Ophiothrix
Pentaceros
Antedon
None of these
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
excretion
absorption
reproduction
respiration
Sea-star
Star fish
Sea-cucumber
Sea lily
sea-hares
sea-stars
devil fish
sea fans
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
Antedon
Echinocardium
Ophiothrix
Pentaceros
parapodia
pseudopodia
setae
tube feet
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
herbivorous
omnivorous
carnivorous
none of these
ctenidia
dermal branchiae
book lungs
trachea
Snail
Slug
Nereis
Sea-urchin
haemal system
digestive system
ambulacral system
reproductive system