number of arms
structure of the ambulacral groove
tube feet
pedicellariae
B. structure of the ambulacral groove
haemal system
digestive system
ambulacral system
reproductive system
Sea-star
Star fish
Sea-cucumber
Sea lily
movable
immovable
prehensile
all of these
Snail
Slug
Nereis
Sea-urchin
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
excretion
absorption
reproduction
respiration
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Sea hares
Brittle stars
Star fishes
Sea fish
coelenterates
polychaetes
echinodermates
hemichordates
Sea cucumber
Sea lily
Sea urchin
Sea star
Asterias
Antedon
Echinus
Ophiothrix
torneria
onchosphere
trochophore
bipinnaria
sand dollar
sea cucumber
sea flies
sea horse
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
Antedon
Echinocardium
Ophiothrix
Pentaceros
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
Star fish
Sea fan
Ship worm
None of these
herbivorous
omnivorous
carnivorous
none of these
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
ctenidia
dermal branchiae
book lungs
trachea
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
Sea star
sea urchin
Sea cucumber
Feather star
echinodea
holothuroidea
asteroidea
ophiuroidea
spines
tube feet
integumentary structures
none of these
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
Sand dollar
Jelly fish
Silver fish
All of these
synapta and antedon
astrias and asterina
ophiothrix and ophioderma
all of these