A Hydra usually possess
single testis and many ovaries
single ovary and many testes
one testis and one ovary
many testes and many ovaries
Correct Answer :
B. single ovary and many testes
Related Questions
The mouth opens into a large single cavity in Hydra
coelom
enterocoel
pseudocoel
coelenteron
Six septa or six mesenteries are characteristic of
Aurelia
Sea anemone
Obelia
Hydra
Green Hydra is
Hydra vulgaris
Chlorohydra viridisma
Hydra oligaetis
None of these
Nematocysts of Hydra are important for
cataching prey
paralysing prey
testing the food
testing the water
Ctenophores generally exhibit
bilateral symmetry
radial symmetry
asymmetry
spherical symmetry
Hydra prevents self fertilization by being
protogynous
hermaphrodite
monoecious
protandrous
Hydra has no special structure for
attachment
respiration
food capturing
offense
A Hydra usually possess
single testis and many ovaries
single ovary and many testes
one testis and one ovary
many testes and many ovaries
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 budding when
plenty of food is present
pond is going dry
Hydra is alone
water becomes muddy
Rhopalia are the sense organs in medusa belonging to the class
hydrozoa
scyphozoa
actinozoa
all of these
Nematocytes are the specialised cells found in the members of the phylum
porifera
coelentrata
annelida
platyhelminthes
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
Tentaculocysts in Obelia are meant for
locomotion
balancing
swimming
reproduction
Polymorphic coelentrates are the members of the class
hydrozoa
scyphozoa
actinozoa
all of these
The scientific name of organ pipe coral is
Tubipora
Astrangia
Meandra
Aeropora
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
A hydranth is
Blastostyle of Obelia
Gonad of Hydra
Medusa of Obelia
Polyp of Obelia
In jelly fishes, the adult is always
polypoid
medusoid
polymorphic
hydroid
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
Ephyra is the larval form of
Sea anemone
Aurelia
Obelia
Hydra
Coral reef formation is mainly related to
sponges
anthozoans
molluscs
hydrozoans
The number of tentacles in Hydra is
24
610
1040
4050
The larva of Hydra is known as
hydrula
planula
tadpole
amphiblastula
A chitinous material is present in the
coenosarc of Obelia
perisarc of Obelia
body wall of Sea anemone
umbrella of Aurelia
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
Musculo-glandular cells are found in hydra
on the tentacles
on the hypostome
on the basal disc
in the gastrodermis
The mesoglea in Hydra is traversed by
sensory cells
nerve cells
interstitial cells
all of these
Ctenophores differ form cnidorians in one important aspect, that is
absence of musculoepithelial cells in the body wall
absence of nematocysts
absence of sensory cells
absence of sexual reproduction