Sea-star
Star fish
Sea-cucumber
Sea lily
C. Sea-cucumber
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
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Sea-star
Star fish
Sea-cucumber
Sea lily
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Sea star
sea urchin
Sea cucumber
Feather star
Snail
Slug
Nereis
Sea-urchin
Ophiothrix
Pentaceros
Antedon
None of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
coelenterates
marine arthropods
echinodermates
sponges
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
Star fish
Sea fan
Ship worm
None of these
excretion
absorption
reproduction
respiration
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
Sea cucumber
Sea lily
Sea urchin
Sea star
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
herbivorous
omnivorous
carnivorous
none of these
Antedon
Echinocardium
Ophiothrix
Pentaceros
sea-hares
sea-stars
devil fish
sea fans
Asterias
Antedon
Echinus
Ophiothrix
movable
immovable
prehensile
all of these
bipinnaria
glochidium
auralia
echinus
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
parapodia
pseudopodia
setae
tube feet
haemal system
digestive system
ambulacral system
reproductive system
sand dollar
sea cucumber
sea flies
sea horse
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
torneria
onchosphere
trochophore
bipinnaria
ctenidia
dermal branchiae
book lungs
trachea
tube feet
lobopodia
cephalopodia
rhizopodia