Hydra is put under phylum coelentrata because it has
tentacles
cnidoblasts
hypostome
interstitial cells
Correct Answer :
B. cnidoblasts
Related Questions
The number of tentacles in Hydra is
24
610
1040
4050
Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three
Tentaculocysts in Obelia are meant for
locomotion
balancing
swimming
reproduction
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
Which one is found in Hydra
Metabolism
Metamerism
Melting
Metamorphosis
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)
Hydra reproduces by gemmation (budding) when
Plenty of food is present
Pond dries up
Water becomes muddy
Hydra is alone
Coelenteron in Hydra serves the purpose of
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
In Hydra, the nematocysts are abundant on
upper part
middle part
tentacles
lower part
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
The scientific name of organ pipe coral is
Tubipora
Astrangia
Meandra
Aeropora
The poisonous fluid present in the nematocysts of Hydra is
toxin
venom
hypnotoxin
haematin
A Hydra usually possess
single testis and many ovaries
single ovary and many testes
one testis and one ovary
many testes and many ovaries
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
Hydra respires through
mesoglea
general surface
pellicle
gastrodermis
The small green alga that lives inside Hydra is called
Zoochlorella
Chlamydomonas
Euglena
None of these
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
If nematocysts are absent in Hydra, which is affected
Locomotion
Predation
Both (a) and (b)
Reproduction
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
Brain coral is
Fungia
Hydra
Meandria
Tubipora
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
The mesoglea of Hydra contains
nerve cells
sensory cells
muscle fibres
no cells
In jelly fishes, the adult is always
polypoid
medusoid
polymorphic
hydroid
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 tentacles of Hydra are
pinnate
hollow
solid
frilled
Rhopalia are the sense organs in medusa belonging to the class
hydrozoa
scyphozoa
actinozoa
all of these
A coelentrate, commonly known as fresh water polyp is
Hydra
Obelia
Physalia
Acerelia
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