ctenidia
dermal branchiae
book lungs
trachea
B. dermal branchiae
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
sea-hares
sea-stars
devil fish
sea fans
Sea-star
Star fish
Sea-cucumber
Sea lily
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
Asterias
Antedon
Echinus
Ophiothrix
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
Sand dollar
Jelly fish
Silver fish
All of these
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Ophiothrix
Pentaceros
Antedon
None of these
movable
immovable
prehensile
all of these
Sea hares
Brittle stars
Star fishes
Sea fish
spines
tube feet
integumentary structures
none of these
Sea stars
Cake urchins
Sea lilies
Sea cucumbers
Sea star
sea urchin
Sea cucumber
Feather star
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
torneria
onchosphere
trochophore
bipinnaria
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
parapodia
pseudopodia
setae
tube feet
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
coelenterates
marine arthropods
echinodermates
sponges
coelenterates
polychaetes
echinodermates
hemichordates
locomotion
respiration
feeding
all of these
echinodea
holothuroidea
asteroidea
ophiuroidea
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these