Cindom is a
battery of nematocysts
group of nematocysts
armed thread
none of these
Correct Answer :
B. group of nematocysts
Related Questions
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
Coelenteron in Hydra serves the purpose of
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
Cindom is a
battery of nematocysts
group of nematocysts
armed thread
none of these
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
Enteron is divided by mesentries in
Aurelia
Sea anemone
Obelia
Hydra
The first invertebrates to develop a true nervous system are
sponges
coelenterates
annelids
arthropods
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)
Strobilization is the characteristic feature of
Aurelia
Hydra
Metridium
Physalia
Digestion in Hydra is
intracellular
extracellular
first extracellular, then intracellular
first intracellular, then extracellular
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
The nematocysts develop from
musculo-epithelial cells
interstitial cells
digestive cells
nerve cell
Green Hydra is
Hydra vulgaris
Chlorohydra viridisma
Hydra oligaetis
None of these
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
Musculo-glandular cells are found in hydra
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
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)
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
Which of the following animals has a nervous system but no brain ?
Earthworm
Hydra
Amoeba
Cockroach
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
In Hydra, the absence of circulatory system is fulfilled by
ectoderm
endoderm
mesoglea
coelenteron
The mouth opens into a large single cavity in Hydra
coelom
enterocoel
pseudocoel
coelenteron
The poisonous fluid present in the nematocysts of Hydra is
toxin
venom
hypnotoxin
haematin
The scientific name of organ pipe coral is
Tubipora
Astrangia
Meandra
Aeropora
Rhopalia are the sense organs in medusa belonging to the class
hydrozoa
scyphozoa
actinozoa
all 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
A coelentrate, commonly known as fresh water polyp is
Hydra
Obelia
Physalia
Acerelia
Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three
Pueumatophore is present in
Tubularia
Obelia
Hydra
Physalia