Polymorphism is found in
Hydra
Aleyonium
Aurelia
Physalia
Correct Answer :
D. Physalia
Related Questions
A coelentrate, commonly known as fresh water polyp is
Hydra
Obelia
Physalia
Acerelia
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)
Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three
Strobilization is the characteristic feature of
Aurelia
Hydra
Metridium
Physalia
Ctenophores generally exhibit
bilateral symmetry
radial symmetry
asymmetry
spherical symmetry
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
Coral reef formation is mainly related to
sponges
anthozoans
molluscs
hydrozoans
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
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
Hydra is negatively chemotropic because it
prefers weak light
moves away from strong light
avoids chlorinated water
moves to water of low temperature
Digestion in Hydra is
intracellular
extracellular
first extracellular, then intracellular
first intracellular, then extracellular
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
Hydra is
marine, radial, symmetrical and diploblastic
fresh water, biradial, symmetrical and triploblastic
fresh water, radial, symmetrical and diploblastic
marine, radial, symmetrical and triploblastic
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
Coelenteron in Hydra serves the purpose of
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
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
"Portuguese Man of War" is the common name for
Aurelia
Metridium
Physalia
Tubipora
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
The testes of hydra are located
below the ovaries
below the tentacles
further down the tentacles to occupy central position of the body
anywhere on the body between tentacles and adhesive disc
In Hydra, the nematocysts are abundant on
upper part
middle part
tentacles
lower part
The poisonous fluid present in the nematocysts of Hydra is
toxin
venom
hypnotoxin
haematin
The nematocysts develop from
musculo-epithelial cells
interstitial cells
digestive cells
nerve cell
Nematocytes are the specialised cells found in the members of the phylum
porifera
coelentrata
annelida
platyhelminthes
Hydra prevents self fertilization by being
protogynous
hermaphrodite
monoecious
protandrous
Polymorphic coelentrates are the members of the class
hydrozoa
scyphozoa
actinozoa
all of these
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
The larva of Hydra is known as
hydrula
planula
tadpole
amphiblastula
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous