excretion
absorption
reproduction
respiration
A. excretion
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
locomotion
respiration
feeding
all of these
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
haemal system
digestive system
ambulacral system
reproductive system
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
Antedon
Echinocardium
Ophiothrix
Pentaceros
bipinnaria
glochidium
auralia
echinus
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
herbivorous
omnivorous
carnivorous
none of these
Star fish
Sea fan
Ship worm
None of these
Sea hares
Brittle stars
Star fishes
Sea fish
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
pluteus
echinopluteus
bipinnaria
auricularia
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
coelenterates
marine arthropods
echinodermates
sponges
movable
immovable
prehensile
all of these
Sea-star
Star fish
Sea-cucumber
Sea lily
Snail
Slug
Nereis
Sea-urchin
echinodea
holothuroidea
asteroidea
ophiuroidea
sand dollar
sea cucumber
sea flies
sea horse
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
ctenidia
dermal branchiae
book lungs
trachea
Sea star
sea urchin
Sea cucumber
Feather star
sea-hares
sea-stars
devil fish
sea fans