coelenterates
polychaetes
echinodermates
hemichordates
C. echinodermates
digestive system
water vascular system
canal system
none of these
locomotion
respiration
feeding
all of these
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
sea-hares
sea-stars
devil fish
sea fans
Sea hares
Brittle stars
Star fishes
Sea fish
haemal system
digestive system
ambulacral system
reproductive system
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
Sand dollar
Jelly fish
Silver fish
All of these
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
movable
immovable
prehensile
all of these
Sea-star
Star fish
Sea-cucumber
Sea lily
sand dollar
sea cucumber
sea flies
sea horse
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
Ophiothrix
Pentaceros
Antedon
None of these
coelenterates
marine arthropods
echinodermates
sponges
coelenterates
polychaetes
echinodermates
hemichordates
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
ctenidia
dermal branchiae
book lungs
trachea
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Asterias
Antedon
Echinus
Ophiothrix
herbivorous
omnivorous
carnivorous
none of these
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
spines
tube feet
integumentary structures
none of these
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these