mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
A. mouth apparatus
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
spines
tube feet
integumentary structures
none of these
coelenterates
polychaetes
echinodermates
hemichordates
sea-hares
sea-stars
devil fish
sea fans
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these
tube feet
lobopodia
cephalopodia
rhizopodia
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
bipinnaria
glochidium
auralia
echinus
Antedon
Echinocardium
Ophiothrix
Pentaceros
herbivorous
omnivorous
carnivorous
none of these
locomotion
respiration
feeding
all of these
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
echinodea
holothuroidea
asteroidea
ophiuroidea
Sea-star
Star fish
Sea-cucumber
Sea lily
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
Sea cucumber
Sea lily
Sea urchin
Sea star
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Star fish
Sea fan
Ship worm
None of these
Ophiothrix
Pentaceros
Antedon
None of these
parapodia
pseudopodia
setae
tube feet
excretion
absorption
reproduction
respiration
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
digestive system
water vascular system
canal system
none of these
Sea hares
Brittle stars
Star fishes
Sea fish
Sand dollar
Jelly fish
Silver fish
All of these
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
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
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies