Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three
Correct Answer :
C. anthozoa
Related Questions
The mesoglea of Hydra contains
nerve cells
sensory cells
muscle fibres
no cells
Nutritionally Hydra is
saprozoic
herbivorous
insectivorous
carnivorous
The flagella of food-absorbing cells in hydra aid in
stirring up the digestive fluid in the digestive cavity
engulfing food particles
engulfing semi-digested particles inside food- absorbing cells
none of these
In jelly fishes, the adult is always
polypoid
medusoid
polymorphic
hydroid
Which of the following tissue is absent in Hydra ?
Connective tissue
Epithelial tissue
Muscular tissue
Nervous tissue
Most favourite food of Hydra is
bacteria
water fleas
tadpoles
fishes
The body of Hydra is
asymmetrical
bilaterally symmetrical
radially symmetrical
irregular
Cindom is a
battery of nematocysts
group of nematocysts
armed thread
none of these
The small green alga that lives inside Hydra is called
Zoochlorella
Chlamydomonas
Euglena
None of these
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
Hydra reproduces by budding when
plenty of food is present
pond is going dry
Hydra is alone
water becomes muddy
In Hydra, buds always arise at
the hypostome
the junction of hypostome and stomach
in junction of stomach and stalk
the stomach
What structures in Hydra functionally correspond to the pseudopodia of Aamoeba ?
Endodermal cells
Mouth
Nematocysts
Tentacles
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 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)
A coelentrate, commonly known as fresh water polyp is
Hydra
Obelia
Physalia
Acerelia
Hydra has no special structure for
attachment
respiration
food capturing
offense
Tentaculocysts in Obelia are meant for
locomotion
balancing
swimming
reproduction
The tentacles of Hydra are
pinnate
hollow
solid
frilled
The first invertebrates to develop a true nervous system are
sponges
coelenterates
annelids
arthropods
Hydra respires through
mesoglea
general surface
pellicle
gastrodermis
Body wall of coelentrates is described as
diploblastic
integument
multicellular
triploblastic
Brain coral is
Fungia
Hydra
Meandria
Tubipora
Coelenteron of Hydra serves the double purpose of
digestion and circulation
digestion and storage
excretion and locomotion
circulation and storage
Rhopalia are the sense organs in medusa belonging to the class
hydrozoa
scyphozoa
actinozoa
all of these
Ephyra is the larval form of
Sea anemone
Aurelia
Obelia
Hydra
In Hydra, the absence of circulatory system is fulfilled by
ectoderm
endoderm
mesoglea
coelenteron
Tentacles of Hydra help in
locomotion
food capturing
locomotion and food capturing
respiration
In Hydra, the physiological division of labour is exhibited by
cellular layers
tissues
cell differentiation
organs
Among coelenterates medusoid individuals are absent in members of the class
hydrozoa
scyphozoa
anthozoa
all the three