Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
Correct Answer :
B. water fleas
Related Questions
Hydra prevents self fertilization by being
protogynous
hermaphrodite
monoecious
protandrous
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
If nematocysts are absent in Hydra, which is affected
Locomotion
Predation
Both (a) and (b)
Reproduction
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
Rhopalia are the sense organs in medusa belonging to the class
hydrozoa
scyphozoa
actinozoa
all of these
Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three
A piece of Hydra will regenerate into a full Hydra if it contains a part of
epidermis alone
gastrodermis alone
both (a) and (b)
(a), (b) and tentacles
The poisonous fluid present in the nematocysts of Hydra is
toxin
venom
hypnotoxin
haematin
The mouth opens into a large single cavity in Hydra
coelom
enterocoel
pseudocoel
coelenteron
Nematocysts of Hydra are important for
cataching prey
paralysing prey
testing the food
testing the water
The body of Hydra is
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
Hydra is
marine, radial, symmetrical and diploblastic
fresh water, biradial, symmetrical and triploblastic
fresh water, radial, symmetrical and diploblastic
marine, radial, symmetrical and triploblastic
Digestion in Hydra is
intracellular
extracellular
first extracellular, then intracellular
first intracellular, then extracellular
A chitinous material is present in the
coenosarc of Obelia
perisarc of Obelia
body wall of Sea anemone
umbrella of Aurelia
Hydra is negatively chemotropic because it
prefers weak light
moves away from strong light
avoids chlorinated water
moves to water of low temperature
Green Hydra is
Hydra vulgaris
Chlorohydra viridisma
Hydra oligaetis
None of these
The nematocysts develop from
musculo-epithelial cells
interstitial cells
digestive cells
nerve cell
Brain coral is
Fungia
Hydra
Meandria
Tubipora
Cindom is a
battery of nematocysts
group of nematocysts
armed thread
none of these
Hydra responds to a strong mechanical stimulus such as agitating the surface of water by
somersaulting
contracting a part or whole of its body
walking away
looping
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
A hydranth is
Blastostyle of Obelia
Gonad of Hydra
Medusa of Obelia
Polyp of Obelia
In Hydra, the gastrodermis is composed of
musculo-epithelial cells
musculo-nutritive cells
sensory cells
cniboblasts
The mesoglea of Hydra contains
nerve cells
sensory cells
muscle fibres
no cells
The small green alga that lives inside Hydra is called
Zoochlorella
Chlamydomonas
Euglena
None of these
Strobilization is the characteristic feature of
Aurelia
Hydra
Metridium
Physalia
Polymorphic coelentrates are the members of the class
hydrozoa
scyphozoa
actinozoa
all of these
The larva of Hydra is known as
hydrula
planula
tadpole
amphiblastula
The tentacles of Hydra are
pinnate
hollow
solid
frilled