Earthworm
Hydra
Amoeba
Cockroach
B. Hydra
upper part
middle part
tentacles
lower part
Aurelia
Sea anemone
Obelia
Hydra
coenosarc of Obelia
perisarc of Obelia
body wall of Sea anemone
umbrella of Aurelia
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
protogynous
hermaphrodite
monoecious
protandrous
intracellular
extracellular
first extracellular, then intracellular
first intracellular, then extracellular
Hydra
Aleyonium
Aurelia
Physalia
mouth only
mouth and anus
large number of pores in the body wall
both (b) and (c)
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
locomotion
balancing
swimming
reproduction
Aurelia
Hydra
Metridium
Physalia
saprozoic
herbivorous
insectivorous
carnivorous
battery of nematocysts
group of nematocysts
armed thread
none of these
hydrozoa
scyphozoa
actinozoa
all of these
attachment
respiration
food capturing
offense
Plenty of food is present
Pond dries up
Water becomes muddy
Hydra is alone
Hydra
Obelia
Monkey
Elephant
Tubipora
Astrangia
Meandra
Aeropora
Fungia
Hydra
Meandria
Tubipora
Metabolism
Metamerism
Melting
Metamorphosis
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
Aurelia
Metridium
Physalia
Tubipora
both parts die
both parts make up the loss and form two new individuals
both parts live independently as they are
none of these
Endodermal cells
Mouth
Nematocysts
Tentacles
Earthworm
Hydra
Amoeba
Cockroach
Tubularia
Obelia
Hydra
Physalia
diploblastic
integument
multicellular
triploblastic
nerve cells
sensory cells
muscle fibres
no cells
coelom
enterocoel
pseudocoel
coelenteron