The number of tentacles in Hydra is
24
610
1040
4050
Correct Answer :
B. 610
Related Questions
Rhopalia are the sense organs in medusa belonging to the class
hydrozoa
scyphozoa
actinozoa
all of these
If nematocysts are absent in Hydra, which is affected
Locomotion
Predation
Both (a) and (b)
Reproduction
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 first invertebrates to develop a true nervous system are
sponges
coelenterates
annelids
arthropods
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
The larva of Hydra is known as
hydrula
planula
tadpole
amphiblastula
The mesoglea in Hydra is traversed by
sensory cells
nerve cells
interstitial cells
all of these
Coelenteron in Hydra serves the purpose of
digestion and circulation
digestion and storage
excretion and digestion
circulation and storage
The body of Hydra is
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
Brain coral is
Fungia
Hydra
Meandria
Tubipora
Hydra is negatively chemotropic because it
prefers weak light
moves away from strong light
avoids chlorinated water
moves to water of low temperature
Nematocytes are the specialised cells found in the members of the phylum
porifera
coelentrata
annelida
platyhelminthes
Hydra respires through
mesoglea
general surface
pellicle
gastrodermis
A coelentrate, commonly known as fresh water polyp is
Hydra
Obelia
Physalia
Acerelia
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
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
Enteron is divided by mesentries in
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
Green Hydra is
Hydra vulgaris
Chlorohydra viridisma
Hydra oligaetis
None of these
Tentaculocysts in Obelia are meant for
locomotion
balancing
swimming
reproduction
Hydra reproduces by budding when
plenty of food is present
pond is going dry
Hydra is alone
water becomes muddy
Hydra is put under phylum coelentrata because it has
tentacles
cnidoblasts
hypostome
interstitial cells
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
Pueumatophore is present in
Tubularia
Obelia
Hydra
Physalia
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 number of tentacles in Hydra is
24
610
1040
4050
Which one is found in Hydra
Metabolism
Metamerism
Melting
Metamorphosis
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
Which of the following animals has a nervous system but no brain ?
Earthworm
Hydra
Amoeba
Cockroach