Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
Correct Answer :
A. digestion and circulation
Related Questions
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
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
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
Which one is found in Hydra
Metabolism
Metamerism
Melting
Metamorphosis
Rhopalia are the sense organs in medusa belonging to the class
hydrozoa
scyphozoa
actinozoa
all of these
Hydra prevents self fertilization by being
protogynous
hermaphrodite
monoecious
protandrous
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
In jelly fishes, the adult is always
polypoid
medusoid
polymorphic
hydroid
Hydra reproduces by gemmation (budding) when
Plenty of food is present
Pond dries up
Water becomes muddy
Hydra is alone
Nematocytes are the specialised cells found in the members of the phylum
porifera
coelentrata
annelida
platyhelminthes
The tentacles of Hydra are
pinnate
hollow
solid
frilled
The number of tentacles in Hydra is
24
610
1040
4050
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
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
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
A hydranth is
Blastostyle of Obelia
Gonad of Hydra
Medusa of Obelia
Polyp of Obelia
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 body of Hydra is
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
Pueumatophore is present in
Tubularia
Obelia
Hydra
Physalia
Polymorphism is found in
Hydra
Aleyonium
Aurelia
Physalia
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
The body wall of Hydra consists of
ecotderm and endoderm
ectoderm and mesoderm
ectoderm, mesoderm and endoderm
epidermis, mesoglea and endoderm
The larva of Hydra is known as
hydrula
planula
tadpole
amphiblastula
Hydra reproduces by budding when
plenty of food is present
pond is going dry
Hydra is alone
water becomes muddy
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
In Hydra, the nematocysts are abundant on
upper part
middle part
tentacles
lower part
The first invertebrates to develop a true nervous system are
sponges
coelenterates
annelids
arthropods
Hydra is
marine, radial, symmetrical and diploblastic
fresh water, biradial, symmetrical and triploblastic
fresh water, radial, symmetrical and diploblastic
marine, radial, symmetrical and triploblastic
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
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage