Aurelia
Hydra
Metridium
Physalia
A. Aurelia
Tubipora
Astrangia
Meandra
Aeropora
porifera
coelentrata
annelida
platyhelminthes
epidermis alone
gastrodermis alone
both (a) and (b)
(a), (b) and tentacles
bilateral symmetry
radial symmetry
asymmetry
spherical symmetry
mouth only
mouth and anus
large number of pores in the body wall
both (b) and (c)
Blastostyle of Obelia
Gonad of Hydra
Medusa of Obelia
Polyp of Obelia
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
toxin
venom
hypnotoxin
haematin
coelom
enterocoel
pseudocoel
coelenteron
protogynous
hermaphrodite
monoecious
protandrous
cellular layers
tissues
cell differentiation
organs
prefers weak light
moves away from strong light
avoids chlorinated water
moves to water of low temperature
attachment
respiration
food capturing
offense
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
non-cellular and jelly like material
cellular jelly like material containing sensory cells
cellular jelly like material containing nerve cells
both (a) and (c)
battery of nematocysts
group of nematocysts
armed thread
none of these
steptoline or atrichous
streptoline or holotrichous
volvent or desmonemes
penetrant or stenoteles
saprozoic
herbivorous
insectivorous
carnivorous
Aurelia
Hydra
Metridium
Physalia
sensory cells
nerve cells
interstitial cells
all of these
ecotderm and endoderm
ectoderm and mesoderm
ectoderm, mesoderm and endoderm
epidermis, mesoglea and endoderm
Aurelia
Sea anemone
Obelia
Hydra
several types of organ-systems in an individual
different kinds of larval forms in the life history of an animal
different functions performed by a single kind of organism
several different types of individuals in a species
diploblastic
integument
multicellular
triploblastic
sponges
anthozoans
molluscs
hydrozoans
polypoid
medusoid
polymorphic
hydroid
Zoochlorella
Chlamydomonas
Euglena
None of these
Aurelia
Metridium
Physalia
Tubipora
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
hydrozoa
scyphozoa
actinozoa
all of these