synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
C. ophiothrix and ophioderma
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
torneria
onchosphere
trochophore
bipinnaria
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
herbivorous
omnivorous
carnivorous
none of these
sea-hares
sea-stars
devil fish
sea fans
tube feet
lobopodia
cephalopodia
rhizopodia
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Ophiothrix
Pentaceros
Antedon
None of these
bipinnaria
glochidium
auralia
echinus
excretion
absorption
reproduction
respiration
Sea cucumber
Sea lily
Sea urchin
Sea star
haemal system
digestive system
ambulacral system
reproductive system
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
sand dollar
sea cucumber
sea flies
sea horse
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
coelenterates
polychaetes
echinodermates
hemichordates
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
coelenterates
marine arthropods
echinodermates
sponges
movable
immovable
prehensile
all of these
ctenidia
dermal branchiae
book lungs
trachea
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
spines
tube feet
integumentary structures
none of these
Sea hares
Brittle stars
Star fishes
Sea fish
Antedon
Echinocardium
Ophiothrix
Pentaceros
Asterias
Antedon
Echinus
Ophiothrix
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
pluteus
echinopluteus
bipinnaria
auricularia