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
C. A masticatory apparatus connected with digestive system in sea urchin
Asterias
Antedon
Echinus
Ophiothrix
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
haemal system
digestive system
ambulacral system
reproductive system
excretion
absorption
reproduction
respiration
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
sea-hares
sea-stars
devil fish
sea fans
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
movable
immovable
prehensile
all of these
Antedon
Echinocardium
Ophiothrix
Pentaceros
ctenidia
dermal branchiae
book lungs
trachea
bipinnaria
glochidium
auralia
echinus
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Snail
Slug
Nereis
Sea-urchin
Sea cucumber
Sea lily
Sea urchin
Sea star
Ophiothrix
Pentaceros
Antedon
None of these
Star fish
Sea fan
Ship worm
None of these
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
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
coelenterates
polychaetes
echinodermates
hemichordates
Sea-star
Star fish
Sea-cucumber
Sea lily
digestive system
water vascular system
canal system
none of these
tube feet
lobopodia
cephalopodia
rhizopodia
coelenterates
marine arthropods
echinodermates
sponges
Sea cucumber
Brittle star
Feather star
Both (b) and (c)