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