Coelenteron in Hydra serves the purpose of
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
Correct Answer :
A. digestion and circulation
Related Questions
Polymorphism is found in
Hydra
Aleyonium
Aurelia
Physalia
Hydra has no special structure for
attachment
respiration
food capturing
offense
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
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
Hydra reproduces by budding when
plenty of food is present
pond is going dry
Hydra is alone
water becomes muddy
Hydra is negatively chemotropic because it
prefers weak light
moves away from strong light
avoids chlorinated water
moves to water of low temperature
Hydra respires through
mesoglea
general surface
pellicle
gastrodermis
Hydra reproduces by gemmation (budding) when
Plenty of food is present
Pond dries up
Water becomes muddy
Hydra is alone
The body wall of Hydra consists of
ecotderm and endoderm
ectoderm and mesoderm
ectoderm, mesoderm and endoderm
epidermis, mesoglea and endoderm
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
What is common between Hydra and Obelia ?
Both show polymorphism
Both possess a larval stage in their life history called planula
Both are found in fresh water
Both havb a jelly like mesoglea with no cells
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
The mesoglea of Hydra contains
nerve cells
sensory cells
muscle fibres
no cells
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
Strobilization is the characteristic feature of
Aurelia
Hydra
Metridium
Physalia
Ctenophores generally exhibit
bilateral symmetry
radial symmetry
asymmetry
spherical symmetry
Brain coral is
Fungia
Hydra
Meandria
Tubipora
The scientific name of organ pipe coral is
Tubipora
Astrangia
Meandra
Aeropora
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
Green Hydra is
Hydra vulgaris
Chlorohydra viridisma
Hydra oligaetis
None of these
The first invertebrates to develop a true nervous system are
sponges
coelenterates
annelids
arthropods
In Hydra, the nematocysts are abundant on
upper part
middle part
tentacles
lower part
Ephyra is the larval form of
Sea anemone
Aurelia
Obelia
Hydra
Musculo-glandular cells are found in hydra
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
What structures in Hydra functionally correspond to the pseudopodia of Aamoeba ?
Endodermal cells
Mouth
Nematocysts
Tentacles
The body of Hydra is
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
The larva of Hydra is known as
hydrula
planula
tadpole
amphiblastula
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach