redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
B. bipinnaria and brachiolaria
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
coelenterates
marine arthropods
echinodermates
sponges
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
Snail
Slug
Nereis
Sea-urchin
movable
immovable
prehensile
all of these
coelenterates
polychaetes
echinodermates
hemichordates
herbivorous
omnivorous
carnivorous
none of these
parapodia
pseudopodia
setae
tube feet
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
sea-hares
sea-stars
devil fish
sea fans
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
tube feet
lobopodia
cephalopodia
rhizopodia
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
Sea star
sea urchin
Sea cucumber
Feather star
pluteus
echinopluteus
bipinnaria
auricularia
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
excretion
absorption
reproduction
respiration
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
bipinnaria
glochidium
auralia
echinus
Sand dollar
Jelly fish
Silver fish
All of these
haemal system
digestive system
ambulacral system
reproductive system
Sea cucumber
Sea lily
Sea urchin
Sea star
Sea hares
Brittle stars
Star fishes
Sea fish
locomotion
respiration
feeding
all of these
spines
tube feet
integumentary structures
none of these
torneria
onchosphere
trochophore
bipinnaria
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
Asterias
Antedon
Echinus
Ophiothrix