The most common composition of skeleton in sponges is :
Cartilage
Mesenchyma
Spicules and spongin fibres
Myonemes
Correct Answer :
C. Spicules and spongin fibres
Related Questions
Exogenous budding, a type of asexual reproduction in sponges is known as
gemmulation
gemmation
regeneration
amphimixis
Sponges are not found in
cold water
sea water
sandy shore
brackish water
Canal system in Leucosolenia is
asconoid
syconoid
leuconoid
rhagon
The larva of Sycoti is
parenchyma
alanula
redia
amphib las tula
The canal system in sponges does not serve the function of
nutrition
respiration
excretion
sexual reproduction
Cells that aid in locomotion of a sponge are
porocytes
myocytes
choanocytes
none of these
The commercial bath sponge belongs to
porifera
gatropoda
coelenterata
ctenophora
The skeleton of sponges is mostly composed of
choanocytes
scleroblasts
pinacocytes
amoebocytes
Lencosolenia is
free living, solitary, marine
free living, fresh water, solitary
free living, colonial, marine
Solitary, colonial, fresh water
A chamber which is common in different types of canal system:
Radial canal
Inhalant canal
Spongocoel
None of these
Gemmules are helpful in
digestion
sexual reproduction
asexual reproduction
current circulation
Difference between a sponge and a metazoan is that sponge do not contain
cells
cell organisation
cell division
division of labour
Animals of phylum porifera are characterised by
diploblastic organisation
coelenteron
canal system
coelom
Food is stored in-of sponges.
trophocytes
thesocytes
desmocytes
archeocytes
The spongocoel is lined by choanocytes in
Leucosolenia
Sycon
Euspnongia
Grautia
Collared, flagellated cells covering large parts of the inner chambers of sponges and helping to keep water circulating are
choanocytes
porocytes
pinacocytes
amoebocytes
The most common composition of skeleton in sponges is :
Cartilage
Mesenchyma
Spicules and spongin fibres
Myonemes
Which one of the following is a flagellated larva of Leucosolenia ?
Planula
Parenchymula
Maggot
Kedia
A sponge is a
coelomata
acoelomata
metacoelomata
pseudocoelomates
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
The central cavity of the sponge is also called
ostea
gastral cavity
gut
gullet
Ostia are meant to
admit water current
pass out water current
ingest food
excrete waste products
The animal nature of sponges was established by
Robert Grant
Trembly
Robert Brown
Ellias
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
In leucosolenia, the scleroblasts perform the function of
absorption of food material
excretion
reproduction
formation of spicules
The scientific name of commercial bath sponge is
Cliona
Hyalonema
Chalina
Euspongia
Canal system is characteristic of
corals
sponges
sea urchin
sea horse
Asexual reproduction in sponges is by forming buds and
gemmules
spicules
spongin fibres
choanocytes
The only fresh water species of sponges is
Scypha
Euspcmgia
Spongilla
None of these
Sponges capture their food by
pinacocytes
thesocytes
choamocytes
scleroblasts