Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
A. Schizocoelic coelom
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
movable
immovable
prehensile
all of these
Sea cucumber
Sea lily
Sea urchin
Sea star
parapodia
pseudopodia
setae
tube feet
Asterias
Antedon
Echinus
Ophiothrix
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
bipinnaria
glochidium
auralia
echinus
haemal system
digestive system
ambulacral system
reproductive system
torneria
onchosphere
trochophore
bipinnaria
locomotion
respiration
feeding
all of these
Antedon
Echinocardium
Ophiothrix
Pentaceros
sand dollar
sea cucumber
sea flies
sea horse
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
excretion
absorption
reproduction
respiration
echinodea
holothuroidea
asteroidea
ophiuroidea
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
digestive system
water vascular system
canal system
none of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
herbivorous
omnivorous
carnivorous
none of these
Sea hares
Brittle stars
Star fishes
Sea fish
coelenterates
polychaetes
echinodermates
hemichordates
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
Sand dollar
Jelly fish
Silver fish
All of these
coelenterates
marine arthropods
echinodermates
sponges
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
tube feet
lobopodia
cephalopodia
rhizopodia
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea