excretion
absorption
reproduction
respiration
A. excretion
excretion
absorption
reproduction
respiration
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
tube feet
lobopodia
cephalopodia
rhizopodia
ctenidia
dermal branchiae
book lungs
trachea
bipinnaria
glochidium
auralia
echinus
Sea-star
Star fish
Sea-cucumber
Sea lily
Sea hares
Brittle stars
Star fishes
Sea fish
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Sea cucumber
Sea lily
Sea urchin
Sea star
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
echinodea
holothuroidea
asteroidea
ophiuroidea
sand dollar
sea cucumber
sea flies
sea horse
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Star fish
Sea fan
Ship worm
None of these
digestive system
water vascular system
canal system
none of these
herbivorous
omnivorous
carnivorous
none of these
locomotion
respiration
feeding
all of these
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
haemal system
digestive system
ambulacral system
reproductive system
coelenterates
marine arthropods
echinodermates
sponges
Antedon
Echinocardium
Ophiothrix
Pentaceros
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Sand dollar
Jelly fish
Silver fish
All of these
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
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
Starfish
Jellyfish
Cuttlefish
Fresh water mussel