Gemmules are helpful in
digestion
sexual reproduction
asexual reproduction
current circulation
Correct Answer :
C. asexual reproduction
Related Questions
The commercial bath sponge is made up of
siliceous spicules
spongin fibres
collagen fibres
elastic fibres
Sycon belongs to the class
calcarea
porifera
hexactinellida
demospongia
Canal system in Leucosolenia is
asconoid
syconoid
leuconoid
rhagon
The larva of Sycoti is
parenchyma
alanula
redia
amphib las tula
Path of water in a sponge is
pinacocyte � choanocyte � osculum
osculum > spongocoel � ostia
ostia > spongocoel � osculum
osculum � ostia > spongocoel
Animals of phylum porifera are characterised by
diploblastic organisation
coelenteron
canal system
coelom
One of the characteristic features of the sponges is the presence of
vaselike globular body
a central cavity
radial symmetry
choanocyts
Canal system is characteristic of
corals
sponges
sea urchin
sea horse
Difference between a sponge and a metazoan is that sponge do not contain
cells
cell organisation
cell division
division of labour
Larva of sponge is known as
planula larva
amphiblastula larva
trochophore larva
glochidium larva
Gemmules are helpful in
digestion
sexual reproduction
asexual reproduction
current circulation
In leucosolenia, the scleroblasts perform the function of
absorption of food material
excretion
reproduction
formation of spicules
Nervous system in sponges
is well developed
is in the form of a network
is made up of several interconnected ganglia
is absent
Sponges with a skeleton of calcium carbonate belongs to the class
calcarea
demospongia
anthozoa
hexactinellida
Sponges belong to the phylum
sporozoa
mastigophora
porifera
coelenterata
Food is stored in-of sponges.
trophocytes
thesocytes
desmocytes
archeocytes
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 only fresh water species of sponges is
Scypha
Euspcmgia
Spongilla
None of these
Cells that aid in locomotion of a sponge are
porocytes
myocytes
choanocytes
none of these
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
The central cavity of the sponge is also called
ostea
gastral cavity
gut
gullet
If a carmine particle is put on the os~ culum of a living sponge, it will
adhere
rotate
be ingested
none of these
The pathway of entring and coming out of water of sponges is
water vascular system
canal system
feeding current
circulating current
Ostia are meant to
admit water current
pass out water current
ingest food
excrete waste products
Phylogenetically, the sponges have evolved from
protozoans
flagellates
choano flagellate
ciliates
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
Lencosolenia is
free living, solitary, marine
free living, fresh water, solitary
free living, colonial, marine
Solitary, colonial, fresh water
The canal system in sponges does not serve the function of
nutrition
respiration
excretion
sexual reproduction
The gametes in sponges develop from
amoebocytes
archeocytes
choanocytes
myocytes