Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
C. Holothuroidea
digestive system
water vascular system
canal system
none of these
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
tube feet
lobopodia
cephalopodia
rhizopodia
coelenterates
marine arthropods
echinodermates
sponges
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Antedon
Echinocardium
Ophiothrix
Pentaceros
sand dollar
sea cucumber
sea flies
sea horse
pluteus
echinopluteus
bipinnaria
auricularia
locomotion
respiration
feeding
all of these
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
ctenidia
dermal branchiae
book lungs
trachea
Ophiothrix
Pentaceros
Antedon
None of these
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
herbivorous
omnivorous
carnivorous
none of these
coelenterates
polychaetes
echinodermates
hemichordates
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
Sea star
sea urchin
Sea cucumber
Feather star
Sea hares
Brittle stars
Star fishes
Sea fish
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Sand dollar
Jelly fish
Silver fish
All of these
torneria
onchosphere
trochophore
bipinnaria
movable
immovable
prehensile
all of these
Star fish
Sea fan
Ship worm
None of these
excretion
absorption
reproduction
respiration
Sea-star
Star fish
Sea-cucumber
Sea lily