Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
Correct Answer :
A. Connective tissue
Related Questions
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
"Portuguese Man of War" is the common name for
Aurelia
Metridium
Physalia
Tubipora
The mesoglea in Hydra is traversed by
sensory cells
nerve cells
interstitial cells
all of these
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
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)
Coral reef formation is mainly related to
sponges
anthozoans
molluscs
hydrozoans
Polymorphism is found in
Hydra
Aleyonium
Aurelia
Physalia
Nematocytes are the specialised cells found in the members of the phylum
porifera
coelentrata
annelida
platyhelminthes
Hydra prevents self fertilization by being
protogynous
hermaphrodite
monoecious
protandrous
The mesoglea of Hydra contains
nerve cells
sensory cells
muscle fibres
no cells
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 scientific name of organ pipe coral is
Tubipora
Astrangia
Meandra
Aeropora
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
The small green alga that lives inside Hydra is called
Zoochlorella
Chlamydomonas
Euglena
None of these
The body of Hydra is
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
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
A coelentrate, commonly known as fresh water polyp is
Hydra
Obelia
Physalia
Acerelia
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
A hydranth is
Blastostyle of Obelia
Gonad of Hydra
Medusa of Obelia
Polyp of Obelia
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
Hydra respires through
mesoglea
general surface
pellicle
gastrodermis
Coelenteron in Hydra serves the purpose of
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
Six septa or six mesenteries are characteristic of
Aurelia
Sea anemone
Obelia
Hydra
A Hydra usually possess
single testis and many ovaries
single ovary and many testes
one testis and one ovary
many testes and many ovaries
Tentaculocysts in Obelia are meant for
locomotion
balancing
swimming
reproduction
Nematocysts of Hydra are important for
cataching prey
paralysing prey
testing the food
testing the water
Musculo-glandular cells are found in hydra
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
A chitinous material is present in the
coenosarc of Obelia
perisarc of Obelia
body wall of Sea anemone
umbrella of Aurelia
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