In Hydra, the gastrodermis is composed of
musculo-epithelial cells
musculo-nutritive cells
sensory cells
cniboblasts
Correct Answer :
B. musculo-nutritive cells
Related Questions
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
A Hydra usually possess
single testis and many ovaries
single ovary and many testes
one testis and one ovary
many testes and many ovaries
A chitinous material is present in the
coenosarc of Obelia
perisarc of Obelia
body wall of Sea anemone
umbrella of Aurelia
Nematocytes are the specialised cells found in the members of the phylum
porifera
coelentrata
annelida
platyhelminthes
The nematocysts develop from
musculo-epithelial cells
interstitial cells
digestive cells
nerve cell
Hydra is negatively chemotropic because it
prefers weak light
moves away from strong light
avoids chlorinated water
moves to water of low temperature
In Hydra, the nematocysts are abundant on
upper part
middle part
tentacles
lower part
Six septa or six mesenteries are characteristic of
Aurelia
Sea anemone
Obelia
Hydra
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
The flagella of food-absorbing cells in hydra aid in
stirring up the digestive fluid in the digestive cavity
engulfing food particles
engulfing semi-digested particles inside food- absorbing cells
none of these
Cindom is a
battery of nematocysts
group of nematocysts
armed thread
none of these
Pueumatophore is present in
Tubularia
Obelia
Hydra
Physalia
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
Hydra reproduces by gemmation (budding) when
Plenty of food is present
Pond dries up
Water becomes muddy
Hydra is alone
The mouth opens into a large single cavity in Hydra
coelom
enterocoel
pseudocoel
coelenteron
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
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 mesoglea present in Hydra in between epidermis and gastrodermis is
non-cellular and jelly like material
cellular jelly like material containing sensory cells
cellular jelly like material containing nerve cells
both (a) and (c)
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
In Hydra, the gastrodermis is composed of
musculo-epithelial cells
musculo-nutritive cells
sensory cells
cniboblasts
Tentaculocysts in Obelia are meant for
locomotion
balancing
swimming
reproduction
Hydra is
marine, radial, symmetrical and diploblastic
fresh water, biradial, symmetrical and triploblastic
fresh water, radial, symmetrical and diploblastic
marine, radial, symmetrical and triploblastic
If a Hydra is cut into two pieces, it is noted that
both parts die
both parts make up the loss and form two new individuals
both parts live independently as they are
none of these
Brain coral is
Fungia
Hydra
Meandria
Tubipora
Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three
Ctenophores differ form cnidorians in one important aspect, that is
absence of musculoepithelial cells in the body wall
absence of nematocysts
absence of sensory cells
absence of sexual reproduction
Which of the following animals has a nervous system but no brain ?
Earthworm
Hydra
Amoeba
Cockroach
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
Nematocysts of Hydra are important for
cataching prey
paralysing prey
testing the food
testing the water
Hydra has no special structure for
attachment
respiration
food capturing
offense