sand dollar
sea cucumber
sea flies
sea horse
A. sand dollar
excretion
absorption
reproduction
respiration
movable
immovable
prehensile
all of these
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
digestive system
water vascular system
canal system
none of these
herbivorous
omnivorous
carnivorous
none of these
spines
tube feet
integumentary structures
none of these
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
echinodea
holothuroidea
asteroidea
ophiuroidea
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
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
Sea-star
Star fish
Sea-cucumber
Sea lily
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
locomotion
respiration
feeding
all of these
sea-hares
sea-stars
devil fish
sea fans
Asterias
Antedon
Echinus
Ophiothrix
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
pluteus
echinopluteus
bipinnaria
auricularia
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
sand dollar
sea cucumber
sea flies
sea horse
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
Sea cucumber
Sea lily
Sea urchin
Sea star
coelenterates
polychaetes
echinodermates
hemichordates
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
tube feet
lobopodia
cephalopodia
rhizopodia
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
coelenterates
marine arthropods
echinodermates
sponges
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system