prefers weak light
moves away from strong light
avoids chlorinated water
moves to water of low temperature
C. avoids chlorinated water
ectoderm
endoderm
mesoglea
coelenteron
pinnate
hollow
solid
frilled
stirring up the digestive fluid in the digestive cavity
engulfing food particles
engulfing semi-digested particles inside food- absorbing cells
none of these
Hydra
Obelia
Physalia
Acerelia
bilateral symmetry
radial symmetry
asymmetry
spherical symmetry
sponges
coelenterates
annelids
arthropods
both parts die
both parts make up the loss and form two new individuals
both parts live independently as they are
none of these
epidermis alone
gastrodermis alone
both (a) and (b)
(a), (b) and tentacles
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
Blastostyle of Obelia
Gonad of Hydra
Medusa of Obelia
Polyp of Obelia
Tubipora
Astrangia
Meandra
Aeropora
mesoglea
general surface
pellicle
gastrodermis
porifera
coelentrata
annelida
platyhelminthes
polypoid
medusoid
polymorphic
hydroid
somersaulting
contracting a part or whole of its body
walking away
looping
both parts die
both parts make up the loss and form two new individuals
both parts live independently as they are
none of these
Fungia
Hydra
Meandria
Tubipora
Aurelia
Sea anemone
Obelia
Hydra
prefers weak light
moves away from strong light
avoids chlorinated water
moves to water of low temperature
Aurelia
Hydra
Metridium
Physalia
Zoochlorella
Chlamydomonas
Euglena
None of these
Hydra
Obelia
Monkey
Elephant
musculo-epithelial cells
musculo-nutritive cells
sensory cells
cniboblasts
Earthworm
Hydra
Amoeba
Cockroach
Metabolism
Metamerism
Melting
Metamorphosis
steptoline or atrichous
streptoline or holotrichous
volvent or desmonemes
penetrant or stenoteles
plenty of food is present
pond is going dry
Hydra is alone
water becomes muddy
single testis and many ovaries
single ovary and many testes
one testis and one ovary
many testes and many ovaries
marine, radial, symmetrical and diploblastic
fresh water, biradial, symmetrical and triploblastic
fresh water, radial, symmetrical and diploblastic
marine, radial, symmetrical and triploblastic