Animals of phylum porifera are characterised by
diploblastic organisation
coelenteron
canal system
coelom
Correct Answer :
C. canal system
Related Questions
What is Euplectella commonly called ?
Glass rope sponge
Venus flower basket
Boring sponge
Commercial bath sponge
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 phylum porifera contains most primitive of multicellular animals called
corals
sea pen
comb jellies
sponges
The most common composition of skeleton in sponges is :
Cartilage
Mesenchyma
Spicules and spongin fibres
Myonemes
Lencosolenia is
free living, solitary, marine
free living, fresh water, solitary
free living, colonial, marine
Solitary, colonial, fresh water
Animals of phylum porifera are characterised by
diploblastic organisation
coelenteron
canal system
coelom
In leucosolenia, the scleroblasts perform the function of
absorption of food material
excretion
reproduction
formation of spicules
One of the internal buds of porifera aris- j ing asexually and coming into activity on I death of parent organism is called
gemma
gemmule
bud
bulbul
Food is stored in-of sponges.
trophocytes
thesocytes
desmocytes
archeocytes
Choanocytes in sponges are present
on the external body surface
line the gastric cavity
located between the outer and inner layers
in the mesodermal layer
Sponges belong to the phylum
sporozoa
mastigophora
porifera
coelenterata
Cells that aid in locomotion of a sponge are
porocytes
myocytes
choanocytes
none of these
Phylogenetically, the sponges have evolved from
protozoans
flagellates
choano flagellate
ciliates
The animal nature of sponges was established by
Robert Grant
Trembly
Robert Brown
Ellias
The only fresh water species of sponges is
Scypha
Euspcmgia
Spongilla
None of these
Exogenous budding, a type of asexual reproduction in sponges is known as
gemmulation
gemmation
regeneration
amphimixis
The scientific name of commercial bath sponge is
Cliona
Hyalonema
Chalina
Euspongia
One of the characteristic features of the sponges is the presence of
vaselike globular body
a central cavity
radial symmetry
choanocyts
Sponges with a skeleton of calcium carbonate belongs to the class
calcarea
demospongia
anthozoa
hexactinellida
The larva of Sycoti is
parenchyma
alanula
redia
amphib las tula
The skeleton of sponges is mostly composed of
choanocytes
scleroblasts
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
A sponge is a
coelomata
acoelomata
metacoelomata
pseudocoelomates
Ostia are meant to
admit water current
pass out water current
ingest food
excrete waste products
Path of water in a sponge is
pinacocyte � choanocyte � osculum
osculum > spongocoel � ostia
ostia > spongocoel � osculum
osculum � ostia > spongocoel
Sponges are not found in
cold water
sea water
sandy shore
brackish water
Collared, flagellated cells covering large parts of the inner chambers of sponges and helping to keep water circulating are
choanocytes
porocytes
pinacocytes
amoebocytes
Difference between a sponge and a metazoan is that sponge do not contain
cells
cell organisation
cell division
division of labour
Canal system in Leucosolenia is
asconoid
syconoid
leuconoid
rhagon
Canal system is characteristic of
corals
sponges
sea urchin
sea horse