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
Correct Answer :
A. both parts die
Related Questions
The nematocysts which are mainly used for defense and offense and which tightly coil around the prey are
steptoline or atrichous
streptoline or holotrichous
volvent or desmonemes
penetrant or stenoteles
Pueumatophore is present in
Tubularia
Obelia
Hydra
Physalia
In Hydra, the nematocysts are abundant on
upper part
middle part
tentacles
lower part
The nematocysts develop from
musculo-epithelial cells
interstitial cells
digestive cells
nerve cell
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
Polymorphism is found in
Hydra
Aleyonium
Aurelia
Physalia
Which one is found in Hydra
Metabolism
Metamerism
Melting
Metamorphosis
What structures in Hydra functionally correspond to the pseudopodia of Aamoeba ?
Endodermal cells
Mouth
Nematocysts
Tentacles
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
The mesoglea of Hydra contains
nerve cells
sensory cells
muscle fibres
no cells
Ctenophores generally exhibit
bilateral symmetry
radial symmetry
asymmetry
spherical symmetry
Digestion in Hydra is
intracellular
extracellular
first extracellular, then intracellular
first intracellular, then extracellular
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
Coelenteron in Hydra serves the purpose of
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
The first invertebrates to develop a true nervous system are
sponges
coelenterates
annelids
arthropods
Enteron is divided by mesentries in
Aurelia
Sea anemone
Obelia
Hydra
The larva of Hydra is known as
hydrula
planula
tadpole
amphiblastula
Brain coral is
Fungia
Hydra
Meandria
Tubipora
Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three
The poisonous fluid present in the nematocysts of Hydra is
toxin
venom
hypnotoxin
haematin
The mesoglea in Hydra is traversed by
sensory cells
nerve cells
interstitial cells
all of these
Musculo-glandular cells are found in hydra
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
Which of the following animals has a nervous system but no brain ?
Earthworm
Hydra
Amoeba
Cockroach
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
Hydra prevents self fertilization by being
protogynous
hermaphrodite
monoecious
protandrous
Ephyra is the larval form of
Sea anemone
Aurelia
Obelia
Hydra
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
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 number of tentacles in Hydra is
24
610
1040
4050