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
Correct Answer :
A. stirring up the digestive fluid in the digestive cavity
Related Questions
Hydra has no special structure for
attachment
respiration
food capturing
offense
If nematocysts are absent in Hydra, which is affected
Locomotion
Predation
Both (a) and (b)
Reproduction
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)
The small green alga that lives inside Hydra is called
Zoochlorella
Chlamydomonas
Euglena
None of these
The body wall of Hydra consists of
ecotderm and endoderm
ectoderm and mesoderm
ectoderm, mesoderm and endoderm
epidermis, mesoglea and endoderm
The scientific name of organ pipe coral is
Tubipora
Astrangia
Meandra
Aeropora
Coelenteron in Hydra serves the purpose of
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
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
Brain coral is
Fungia
Hydra
Meandria
Tubipora
Strobilization is the characteristic feature of
Aurelia
Hydra
Metridium
Physalia
What structures in Hydra functionally correspond to the pseudopodia of Aamoeba ?
Endodermal cells
Mouth
Nematocysts
Tentacles
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
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
The nematocysts develop from
musculo-epithelial cells
interstitial cells
digestive cells
nerve cell
Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three
The mouth opens into a large single cavity in Hydra
coelom
enterocoel
pseudocoel
coelenteron
Coral reef formation is mainly related to
sponges
anthozoans
molluscs
hydrozoans
Which one is found in Hydra
Metabolism
Metamerism
Melting
Metamorphosis
Ctenophores generally exhibit
bilateral symmetry
radial symmetry
asymmetry
spherical symmetry
The mesoglea in Hydra is traversed by
sensory cells
nerve cells
interstitial cells
all of these
A Hydra usually possess
single testis and many ovaries
single ovary and many testes
one testis and one ovary
many testes and many ovaries
The poisonous fluid present in the nematocysts of Hydra is
toxin
venom
hypnotoxin
haematin
The number of tentacles in Hydra is
24
610
1040
4050
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
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
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
Polymorphic coelentrates are the members of the class
hydrozoa
scyphozoa
actinozoa
all of these
In jelly fishes, the adult is always
polypoid
medusoid
polymorphic
hydroid
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous