Sea cucumber
Sea lily
Sea urchin
Sea star
A. Sea cucumber
pluteus
echinopluteus
bipinnaria
auricularia
torneria
onchosphere
trochophore
bipinnaria
bipinnaria
glochidium
auralia
echinus
herbivorous
omnivorous
carnivorous
none of these
coelenterates
polychaetes
echinodermates
hemichordates
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
Sea cucumber
Sea lily
Sea urchin
Sea star
spines
tube feet
integumentary structures
none of these
tube feet
lobopodia
cephalopodia
rhizopodia
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
Star fish
Sea fan
Ship worm
None of these
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
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
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
ctenidia
dermal branchiae
book lungs
trachea
Antedon
Echinocardium
Ophiothrix
Pentaceros
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Ophiothrix
Pentaceros
Antedon
None of these
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
Sea hares
Brittle stars
Star fishes
Sea fish
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
Sea-star
Star fish
Sea-cucumber
Sea lily
Snail
Slug
Nereis
Sea-urchin