The mesoglea of Hydra contains
nerve cells
sensory cells
muscle fibres
no cells
Correct Answer :
D. no cells
Related Questions
Cindom is a
battery of nematocysts
group of nematocysts
armed thread
none of these
Nematocytes are the specialised cells found in the members of the phylum
porifera
coelentrata
annelida
platyhelminthes
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
The body of Hydra is
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
The first invertebrates to develop a true nervous system are
sponges
coelenterates
annelids
arthropods
A coelentrate, commonly known as fresh water polyp is
Hydra
Obelia
Physalia
Acerelia
Polymorphism is found in
Hydra
Aleyonium
Aurelia
Physalia
Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
The small green alga that lives inside Hydra is called
Zoochlorella
Chlamydomonas
Euglena
None of these
Hydra respires through
mesoglea
general surface
pellicle
gastrodermis
The scientific name of organ pipe coral is
Tubipora
Astrangia
Meandra
Aeropora
Brain coral is
Fungia
Hydra
Meandria
Tubipora
Which one is found in Hydra
Metabolism
Metamerism
Melting
Metamorphosis
The poisonous fluid present in the nematocysts of Hydra is
toxin
venom
hypnotoxin
haematin
The mesoglea of Hydra contains
nerve cells
sensory cells
muscle fibres
no cells
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
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
Digestion in Hydra is
intracellular
extracellular
first extracellular, then intracellular
first intracellular, then extracellular
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
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 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
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
Nematocysts of Hydra are important for
cataching prey
paralysing prey
testing the food
testing the water
Pueumatophore is present in
Tubularia
Obelia
Hydra
Physalia
Musculo-glandular cells are found in hydra
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
A hydranth is
Blastostyle of Obelia
Gonad of Hydra
Medusa of Obelia
Polyp of Obelia
The mouth opens into a large single cavity in Hydra
coelom
enterocoel
pseudocoel
coelenteron
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
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration