(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
D. (d) None of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
pluteus
echinopluteus
bipinnaria
auricularia
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
Sea-star
Star fish
Sea-cucumber
Sea lily
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
sand dollar
sea cucumber
sea flies
sea horse
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
parapodia
pseudopodia
setae
tube feet
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Antedon
Echinocardium
Ophiothrix
Pentaceros
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
excretion
absorption
reproduction
respiration
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
locomotion
respiration
feeding
all of these
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
coelenterates
marine arthropods
echinodermates
sponges
Sea hares
Brittle stars
Star fishes
Sea fish
coelenterates
polychaetes
echinodermates
hemichordates
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
bipinnaria
glochidium
auralia
echinus
sea-hares
sea-stars
devil fish
sea fans
spines
tube feet
integumentary structures
none of these
Sea cucumber
Sea lily
Sea urchin
Sea star
Sea star
sea urchin
Sea cucumber
Feather star
digestive system
water vascular system
canal system
none of these
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
torneria
onchosphere
trochophore
bipinnaria
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these