In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
Correct Answer :
C. in junction of stomach and stalk
Related Questions
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
"Portuguese Man of War" is the common name for
Aurelia
Metridium
Physalia
Tubipora
Musculo-glandular cells are found in hydra
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
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 reproduces by gemmation (budding) when
Plenty of food is present
Pond dries up
Water becomes muddy
Hydra is alone
Coral reef formation is mainly related to
sponges
anthozoans
molluscs
hydrozoans
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
The number of tentacles in Hydra is
24
610
1040
4050
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
Hydra is
marine, radial, symmetrical and diploblastic
fresh water, biradial, symmetrical and triploblastic
fresh water, radial, symmetrical and diploblastic
marine, radial, symmetrical and triploblastic
Which of the following animals has a nervous system but no brain ?
Earthworm
Hydra
Amoeba
Cockroach
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
A piece of Hydra will regenerate into a full Hydra if it contains a part of
epidermis alone
gastrodermis alone
both (a) and (b)
(a), (b) and tentacles
The nematocysts develop from
musculo-epithelial cells
interstitial cells
digestive cells
nerve cell
Enteron is divided by mesentries in
Aurelia
Sea anemone
Obelia
Hydra
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
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
Strobilization is the characteristic feature of
Aurelia
Hydra
Metridium
Physalia
Which one is found in Hydra
Metabolism
Metamerism
Melting
Metamorphosis
Six septa or six mesenteries are characteristic of
Aurelia
Sea anemone
Obelia
Hydra
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
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
Nematocytes are the specialised cells found in the members of the phylum
porifera
coelentrata
annelida
platyhelminthes
A Hydra usually possess
single testis and many ovaries
single ovary and many testes
one testis and one ovary
many testes and many ovaries
Hydra reproduces by budding when
plenty of food is present
pond is going dry
Hydra is alone
water becomes muddy
Communication between the enteron and exterior in coelentrates is through
mouth only
mouth and anus
large number of pores in the body wall
both (b) and (c)
The testes of hydra are located
below the ovaries
below the tentacles
further down the tentacles to occupy central position of the body
anywhere on the body between tentacles and adhesive disc
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant