Path of water in a sponge is
pinacocyte � choanocyte � osculum
osculum > spongocoel � ostia
ostia > spongocoel � osculum
osculum � ostia > spongocoel
Correct Answer :
C. ostia > spongocoel � osculum
Related Questions
The most common composition of skeleton in sponges is :
Cartilage
Mesenchyma
Spicules and spongin fibres
Myonemes
In leucosolenia, the scleroblasts perform the function of
absorption of food material
excretion
reproduction
formation of spicules
Gemmules are helpful in
digestion
sexual reproduction
asexual reproduction
current circulation
Lencosolenia is
free living, solitary, marine
free living, fresh water, solitary
free living, colonial, marine
Solitary, colonial, fresh water
Path of water in a sponge is
pinacocyte � choanocyte � osculum
osculum > spongocoel � ostia
ostia > spongocoel � osculum
osculum � ostia > spongocoel
One of the characteristic features of the sponges is the presence of
vaselike globular body
a central cavity
radial symmetry
choanocyts
The animal nature of sponges was established by
Robert Grant
Trembly
Robert Brown
Ellias
Ostia are meant to
admit water current
pass out water current
ingest food
excrete waste products
Collared, flagellated cells covering large parts of the inner chambers of sponges and helping to keep water circulating are
choanocytes
porocytes
pinacocytes
amoebocytes
Sponges belong to the phylum
sporozoa
mastigophora
porifera
coelenterata
Sponges with a skeleton of calcium carbonate belongs to the class
calcarea
demospongia
anthozoa
hexactinellida
Canal system in Leucosolenia is
asconoid
syconoid
leuconoid
rhagon
Larva of sponge is known as
planula larva
amphiblastula larva
trochophore larva
glochidium larva
Which one of the following is a flagellated larva of Leucosolenia ?
Planula
Parenchymula
Maggot
Kedia
The canal system in sponges does not serve the function of
nutrition
respiration
excretion
sexual reproduction
The pathway of entring and coming out of water of sponges is
water vascular system
canal system
feeding current
circulating current
A sponge is a
coelomata
acoelomata
metacoelomata
pseudocoelomates
A chamber which is common in different types of canal system:
Radial canal
Inhalant canal
Spongocoel
None of these
The central cavity of the sponge is also called
ostea
gastral cavity
gut
gullet
Difference between a sponge and a metazoan is that sponge do not contain
cells
cell organisation
cell division
division of labour
Food is stored in-of sponges.
trophocytes
thesocytes
desmocytes
archeocytes
Sponges capture their food by
choanocytes
porocytes
amoebocytes
pinacocytes
Which of the following is given as a gift in Japan?
Hyalonema
Tethya
Euplectalla
Pheronetna
The spongocoel is lined by choanocytes in
Leucosolenia
Sycon
Euspnongia
Grautia
Asexual reproduction in sponges is by forming buds and
gemmules
spicules
spongin fibres
choanocytes
Which of the following statements is true of sponges ?
One mouth and innumerable exits
Mouth serves for both, ingestion and egestion
Innumerable mouths and one exit
The body encloses a single cavity the coeienteron
The skeleton in sponges is composed of
gemmules
spicules
spongin fibre
trychocysts
The only fresh water species of sponges is
Scypha
Euspcmgia
Spongilla
None of these
The skeleton of sponges is mostly composed of
choanocytes
scleroblasts
pinacocytes
amoebocytes
Exogenous budding, a type of asexual reproduction in sponges is known as
gemmulation
gemmation
regeneration
amphimixis