The body of Hydra is
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
Correct Answer :
C. radially symmetrical
Related Questions
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
Musculo-glandular cells are found in hydra
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
The poisonous fluid present in the nematocysts of Hydra is
toxin
venom
hypnotoxin
haematin
Tentaculocysts in Obelia are meant for
locomotion
balancing
swimming
reproduction
A coelentrate, commonly known as fresh water polyp is
Hydra
Obelia
Physalia
Acerelia
The small green alga that lives inside Hydra is called
Zoochlorella
Chlamydomonas
Euglena
None of these
The mesoglea of Hydra contains
nerve cells
sensory cells
muscle fibres
no cells
Polymorphic coelentrates are the members of the class
hydrozoa
scyphozoa
actinozoa
all of these
Cindom is a
battery of nematocysts
group of nematocysts
armed thread
none of these
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
The scientific name of organ pipe coral is
Tubipora
Astrangia
Meandra
Aeropora
The larva of Hydra is known as
hydrula
planula
tadpole
amphiblastula
What structures in Hydra functionally correspond to the pseudopodia of Aamoeba ?
Endodermal cells
Mouth
Nematocysts
Tentacles
The number of tentacles in Hydra is
24
610
1040
4050
"Portuguese Man of War" is the common name for
Aurelia
Metridium
Physalia
Tubipora
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)
A hydranth is
Blastostyle of Obelia
Gonad of Hydra
Medusa of Obelia
Polyp of Obelia
The first invertebrates to develop a true nervous system are
sponges
coelenterates
annelids
arthropods
Hydra respires through
mesoglea
general surface
pellicle
gastrodermis
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
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
In jelly fishes, the adult is always
polypoid
medusoid
polymorphic
hydroid
The nematocysts develop from
musculo-epithelial cells
interstitial cells
digestive cells
nerve cell
The body of Hydra is
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
Hydra reproduces by budding when
plenty of food is present
pond is going dry
Hydra is alone
water becomes muddy