Sea stars
Cake urchins
Sea lilies
Sea cucumbers
C. Sea lilies
echinodea
holothuroidea
asteroidea
ophiuroidea
sand dollar
sea cucumber
sea flies
sea horse
coelenterates
polychaetes
echinodermates
hemichordates
ctenidia
dermal branchiae
book lungs
trachea
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
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Ophiothrix
Pentaceros
Antedon
None of these
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
herbivorous
omnivorous
carnivorous
none of these
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
Snail
Slug
Nereis
Sea-urchin
Sea cucumber
Sea lily
Sea urchin
Sea star
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
movable
immovable
prehensile
all of these
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
torneria
onchosphere
trochophore
bipinnaria
bipinnaria
glochidium
auralia
echinus
Sea hares
Brittle stars
Star fishes
Sea fish
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
haemal system
digestive system
ambulacral system
reproductive system
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Antedon
Echinocardium
Ophiothrix
Pentaceros
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
Sea-star
Star fish
Sea-cucumber
Sea lily
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
pluteus
echinopluteus
bipinnaria
auricularia
sea-hares
sea-stars
devil fish
sea fans
number of arms
structure of the ambulacral groove
tube feet
pedicellariae