Hydra reproduces by budding when
plenty of food is present
pond is going dry
Hydra is alone
water becomes muddy
Correct Answer :
A. plenty of food is present
Related Questions
Green Hydra is
Hydra vulgaris
Chlorohydra viridisma
Hydra oligaetis
None of these
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
The poisonous fluid present in the nematocysts of Hydra is
toxin
venom
hypnotoxin
haematin
Six septa or six mesenteries are characteristic of
Aurelia
Sea anemone
Obelia
Hydra
Ephyra is the larval form of
Sea anemone
Aurelia
Obelia
Hydra
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
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
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)
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)
A coelentrate, commonly known as fresh water polyp is
Hydra
Obelia
Physalia
Acerelia
Polymorphism is found in
Hydra
Aleyonium
Aurelia
Physalia
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
Nematocysts of Hydra are important for
cataching prey
paralysing prey
testing the food
testing the water
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
Hydra is put under phylum coelentrata because it has
tentacles
cnidoblasts
hypostome
interstitial cells
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
Hydra prevents self fertilization by being
protogynous
hermaphrodite
monoecious
protandrous
A chitinous material is present in the
coenosarc of Obelia
perisarc of Obelia
body wall of Sea anemone
umbrella of Aurelia
Division of labour on morphological basis is well exemplified by
Hydra
Obelia
Monkey
Elephant
Cindom is a
battery of nematocysts
group of nematocysts
armed thread
none of these
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
Tentaculocysts in Obelia are meant for
locomotion
balancing
swimming
reproduction
"Portuguese Man of War" is the common name for
Aurelia
Metridium
Physalia
Tubipora
Polymorphic coelentrates are the members of the class
hydrozoa
scyphozoa
actinozoa
all of these
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
In Hydra, the gastrodermis is composed of
musculo-epithelial cells
musculo-nutritive cells
sensory cells
cniboblasts
Enteron is divided by mesentries in
Aurelia
Sea anemone
Obelia
Hydra