Sand dollar
Jelly fish
Silver fish
All of these
A. Sand dollar
coelenterates
polychaetes
echinodermates
hemichordates
Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
Ophiothrix
Pentaceros
Antedon
None of these
Sand dollar
Jelly fish
Silver fish
All of these
echinodea
holothuroidea
asteroidea
ophiuroidea
locomotion
respiration
feeding
all of these
Snail
Slug
Nereis
Sea-urchin
tube feet
lobopodia
cephalopodia
rhizopodia
Sea cucumber
Brittle star
Feather star
Both (b) and (c)
pluteus
echinopluteus
bipinnaria
auricularia
herbivorous
omnivorous
carnivorous
none of these
ctenidia
dermal branchiae
book lungs
trachea
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
torneria
onchosphere
trochophore
bipinnaria
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
movable
immovable
prehensile
all of these
haemal system
digestive system
ambulacral system
reproductive system
digestive system
water vascular system
canal system
none of these
Antedon
Echinocardium
Ophiothrix
Pentaceros
sand dollar
sea cucumber
sea flies
sea horse
Sea-star
Star fish
Sea-cucumber
Sea lily
Crinoidea
Asteroidea
Holothuroidea
Ophiuroidea
Sea cucumber
Sea lily
Sea urchin
Sea star
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
Asteroidea
Crinoidea
Ophiuroidea
Holothuroidea
spines
tube feet
integumentary structures
none of these
sea-hares
sea-stars
devil fish
sea fans
excretion
absorption
reproduction
respiration
Sea star
sea urchin
Sea cucumber
Feather star