movable
immovable
prehensile
all of these
A. movable
Sea hares
Brittle stars
Star fishes
Sea fish
Ophiothrix
Pentaceros
Antedon
None of these
Asterias
Antedon
Echinus
Ophiothrix
echinodea
holothuroidea
asteroidea
ophiuroidea
excretion
absorption
reproduction
respiration
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
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
Snail
Slug
Nereis
Sea-urchin
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Sea cucumber
Sea lily
Sea urchin
Sea star
locomotion
respiration
feeding
all of these
torneria
onchosphere
trochophore
bipinnaria
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Star fish
Sea fan
Ship worm
None of these
Sand dollar
Jelly fish
Silver fish
All of these
coelenterates
marine arthropods
echinodermates
sponges
spines
tube feet
integumentary structures
none of these
tube feet
lobopodia
cephalopodia
rhizopodia
digestive system
water vascular system
canal system
none of these
haemal system
digestive system
ambulacral system
reproductive system
Sea star
sea urchin
Sea cucumber
Feather star
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
pluteus
echinopluteus
bipinnaria
auricularia
movable
immovable
prehensile
all of these