Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
A. Schizocoelic coelom
haemal system
digestive system
ambulacral system
reproductive system
Antedon
Echinocardium
Ophiothrix
Pentaceros
sand dollar
sea cucumber
sea flies
sea horse
parapodia
pseudopodia
setae
tube feet
Ophiothrix
Pentaceros
Antedon
None of these
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
digestive system
water vascular system
canal system
none of these
Sea cucumber
Sea lily
Sea urchin
Sea star
coelenterates
polychaetes
echinodermates
hemichordates
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
sea-hares
sea-stars
devil fish
sea fans
Sand dollar
Jelly fish
Silver fish
All of these
torneria
onchosphere
trochophore
bipinnaria
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
herbivorous
omnivorous
carnivorous
none of these
tube feet
lobopodia
cephalopodia
rhizopodia
excretion
absorption
reproduction
respiration
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
echinodea
holothuroidea
asteroidea
ophiuroidea
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
Snail
Slug
Nereis
Sea-urchin
Sea hares
Brittle stars
Star fishes
Sea fish
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Sea star
sea urchin
Sea cucumber
Feather star
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)