Difference between a sponge and a metazoan is that sponge do not contain
cells
cell organisation
cell division
division of labour
Correct Answer :
B. cell organisation
Related Questions
If a carmine particle is put on the os~ culum of a living sponge, it will
adhere
rotate
be ingested
none of these
Which is not a larva of sponge?
Planula
Stomogastrula
Amphiblastula
Terogastrula
Asexual reproduction in sponges is by forming buds and
gemmules
spicules
spongin fibres
choanocytes
Larva of sponge is known as
planula larva
amphiblastula larva
trochophore larva
glochidium larva
Difference between a sponge and a metazoan is that sponge do not contain
cells
cell organisation
cell division
division of labour
Lencosolenia is
free living, solitary, marine
free living, fresh water, solitary
free living, colonial, marine
Solitary, colonial, fresh water
The animal nature of sponges was established by
Robert Grant
Trembly
Robert Brown
Ellias
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
Sycon belongs to the class
calcarea
porifera
hexactinellida
demospongia
Collared, flagellated cells covering large parts of the inner chambers of sponges and helping to keep water circulating are
choanocytes
porocytes
pinacocytes
amoebocytes
In leucosolenia, the scleroblasts perform the function of
absorption of food material
excretion
reproduction
formation of spicules
Food is stored in-of sponges.
trophocytes
thesocytes
desmocytes
archeocytes
Which of the following is given as a gift in Japan?
Hyalonema
Tethya
Euplectalla
Pheronetna
The skeleton in sponges is composed of
gemmules
spicules
spongin fibre
trychocysts
Exogenous budding, a type of asexual reproduction in sponges is known as
gemmulation
gemmation
regeneration
amphimixis
Gemmules are helpful in
digestion
sexual reproduction
asexual reproduction
current circulation
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
The pathway of entring and coming out of water of sponges is
water vascular system
canal system
feeding current
circulating current
Sponges with a skeleton of calcium carbonate belongs to the class
calcarea
demospongia
anthozoa
hexactinellida
Sponges are not found in
cold water
sea water
sandy shore
brackish water
The most common composition of skeleton in sponges is :
Cartilage
Mesenchyma
Spicules and spongin fibres
Myonemes
A sponge is a
coelomata
acoelomata
metacoelomata
pseudocoelomates
Ostia are meant to
admit water current
pass out water current
ingest food
excrete waste products
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
Which one of the following is a flagellated larva of Leucosolenia ?
Planula
Parenchymula
Maggot
Kedia
Animals of phylum porifera are characterised by
diploblastic organisation
coelenteron
canal system
coelom
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
Path of water in a sponge is
pinacocyte � choanocyte � osculum
osculum > spongocoel � ostia
ostia > spongocoel � osculum
osculum � ostia > spongocoel
The canal system in sponges does not serve the function of
nutrition
respiration
excretion
sexual reproduction