Ostia are meant to
admit water current
pass out water current
ingest food
excrete waste products
Correct Answer :
A. admit water current
Related Questions
The commercial bath sponge belongs to
porifera
gatropoda
coelenterata
ctenophora
The animal nature of sponges was established by
Robert Grant
Trembly
Robert Brown
Ellias
Sponges capture their food by
pinacocytes
thesocytes
choamocytes
scleroblasts
Nervous system in sponges
is well developed
is in the form of a network
is made up of several interconnected ganglia
is absent
The only fresh water species of sponges is
Scypha
Euspcmgia
Spongilla
None of these
A sponge is a
coelomata
acoelomata
metacoelomata
pseudocoelomates
Lencosolenia is
free living, solitary, marine
free living, fresh water, solitary
free living, colonial, marine
Solitary, colonial, fresh water
Sponges are not found in
cold water
sea water
sandy shore
brackish water
Sycon belongs to the class
calcarea
porifera
hexactinellida
demospongia
Sponges with a skeleton of calcium carbonate belongs to the class
calcarea
demospongia
anthozoa
hexactinellida
Difference between a sponge and a metazoan is that sponge do not contain
cells
cell organisation
cell division
division of labour
Which is not a larva of sponge?
Planula
Stomogastrula
Amphiblastula
Terogastrula
Path of water in a sponge is
pinacocyte � choanocyte � osculum
osculum > spongocoel � ostia
ostia > spongocoel � osculum
osculum � ostia > spongocoel
The skeleton of sponges is mostly composed of
choanocytes
scleroblasts
pinacocytes
amoebocytes
Canal system in Leucosolenia is
asconoid
syconoid
leuconoid
rhagon
Animals of phylum porifera are characterised by
diploblastic organisation
coelenteron
canal system
coelom
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 scientific name of commercial bath sponge is
Cliona
Hyalonema
Chalina
Euspongia
Asexual reproduction in sponges is by forming buds and
gemmules
spicules
spongin fibres
choanocytes
Canal system is characteristic of
corals
sponges
sea urchin
sea horse
Sponges belong to the phylum
sporozoa
mastigophora
porifera
coelenterata
The pathway of entring and coming out of water of sponges is
water vascular system
canal system
feeding current
circulating current
Gemmules are helpful in
digestion
sexual reproduction
asexual reproduction
current circulation
Collared, flagellated cells covering large parts of the inner chambers of sponges and helping to keep water circulating are
choanocytes
porocytes
pinacocytes
amoebocytes
If a carmine particle is put on the os~ culum of a living sponge, it will
adhere
rotate
be ingested
none of these
Sponges capture their food by
choanocytes
porocytes
amoebocytes
pinacocytes
One of the characteristic features of the sponges is the presence of
vaselike globular body
a central cavity
radial symmetry
choanocyts
The larva of Sycoti is
parenchyma
alanula
redia
amphib las tula
Phylogenetically, the sponges have evolved from
protozoans
flagellates
choano flagellate
ciliates
The commercial bath sponge is made up of
siliceous spicules
spongin fibres
collagen fibres
elastic fibres