Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
C. System of internal seleton
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
Star fish
Sea fan
Ship worm
None of these
pluteus
echinopluteus
bipinnaria
auricularia
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
parapodia
pseudopodia
setae
tube feet
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
echinodea
holothuroidea
asteroidea
ophiuroidea
Ophiothrix
Pentaceros
Antedon
None of these
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
movable
immovable
prehensile
all of these
digestive system
water vascular system
canal system
none of these
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Sand dollar
Jelly fish
Silver fish
All of these
spines
tube feet
integumentary structures
none of these
Asterias
Antedon
Echinus
Ophiothrix
Antedon
Echinocardium
Ophiothrix
Pentaceros
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Sea star
sea urchin
Sea cucumber
Feather star
excretion
absorption
reproduction
respiration
ctenidia
dermal branchiae
book lungs
trachea
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
sand dollar
sea cucumber
sea flies
sea horse
Snail
Slug
Nereis
Sea-urchin
Sea hares
Brittle stars
Star fishes
Sea fish
sea-hares
sea-stars
devil fish
sea fans
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
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these