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
Correct Answer :
B. contracting a part or whole of its body
Related Questions
The larva of Hydra is known as
hydrula
planula
tadpole
amphiblastula
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
The scientific name of organ pipe coral is
Tubipora
Astrangia
Meandra
Aeropora
In Hydra, the absence of circulatory system is fulfilled by
ectoderm
endoderm
mesoglea
coelenteron
What structures in Hydra functionally correspond to the pseudopodia of Aamoeba ?
Endodermal cells
Mouth
Nematocysts
Tentacles
Digestion in Hydra is
intracellular
extracellular
first extracellular, then intracellular
first intracellular, then extracellular
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
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)
"Portuguese Man of War" is the common name for
Aurelia
Metridium
Physalia
Tubipora
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
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
The small green alga that lives inside Hydra is called
Zoochlorella
Chlamydomonas
Euglena
None of these
Which one is found in Hydra
Metabolism
Metamerism
Melting
Metamorphosis
Enteron is divided by mesentries in
Aurelia
Sea anemone
Obelia
Hydra
Polymorphism is best defined as the occurrence of
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
The nematocysts develop from
musculo-epithelial cells
interstitial cells
digestive cells
nerve cell
The number of tentacles in Hydra is
24
610
1040
4050
Hydra has no special structure for
attachment
respiration
food capturing
offense
Polymorphic coelentrates are the members of the class
hydrozoa
scyphozoa
actinozoa
all of these
Polymorphism is found in
Hydra
Aleyonium
Aurelia
Physalia
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
Ephyra is the larval form of
Sea anemone
Aurelia
Obelia
Hydra
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
In Hydra, the gastrodermis is composed of
musculo-epithelial cells
musculo-nutritive cells
sensory cells
cniboblasts
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
The body wall of Hydra consists of
ecotderm and endoderm
ectoderm and mesoderm
ectoderm, mesoderm and endoderm
epidermis, mesoglea and endoderm
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
The mouth opens into a large single cavity in Hydra
coelom
enterocoel
pseudocoel
coelenteron
Hydra prevents self fertilization by being
protogynous
hermaphrodite
monoecious
protandrous
Green Hydra is
Hydra vulgaris
Chlorohydra viridisma
Hydra oligaetis
None of these