sand dollar
sea cucumber
sea flies
sea horse
A. sand dollar
Sand dollar
Jelly fish
Silver fish
All of these
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Antedon
Echinocardium
Ophiothrix
Pentaceros
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Sea hares
Brittle stars
Star fishes
Sea fish
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
coelenterates
polychaetes
echinodermates
hemichordates
herbivorous
omnivorous
carnivorous
none of these
Sea cucumber
Sea lily
Sea urchin
Sea star
echinodea
holothuroidea
asteroidea
ophiuroidea
sand dollar
sea cucumber
sea flies
sea horse
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
ctenidia
dermal branchiae
book lungs
trachea
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
bipinnaria
glochidium
auralia
echinus
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
parapodia
pseudopodia
setae
tube feet
Snail
Slug
Nereis
Sea-urchin
excretion
absorption
reproduction
respiration
digestive system
water vascular system
canal system
none of these
Asterias
Antedon
Echinus
Ophiothrix
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
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
pluteus
echinopluteus
bipinnaria
auricularia
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
torneria
onchosphere
trochophore
bipinnaria
tube feet
lobopodia
cephalopodia
rhizopodia