Canal system is characteristic of
corals
sponges
sea urchin
sea horse
Correct Answer :
B. sponges
Related Questions
The most common composition of skeleton in sponges is :
Cartilage
Mesenchyma
Spicules and spongin fibres
Myonemes
Which is not a larva of sponge?
Planula
Stomogastrula
Amphiblastula
Terogastrula
The animal nature of sponges was established by
Robert Grant
Trembly
Robert Brown
Ellias
Asexual reproduction in sponges is by forming buds and
gemmules
spicules
spongin fibres
choanocytes
Food is stored in-of sponges.
trophocytes
thesocytes
desmocytes
archeocytes
In leucosolenia, the scleroblasts perform the function of
absorption of food material
excretion
reproduction
formation of spicules
Gemmules are helpful in
digestion
sexual reproduction
asexual reproduction
current circulation
The pathway of entring and coming out of water of sponges is
water vascular system
canal system
feeding current
circulating current
A chamber which is common in different types of canal system:
Radial canal
Inhalant canal
Spongocoel
None of these
A sponge is a
coelomata
acoelomata
metacoelomata
pseudocoelomates
Canal system is characteristic of
corals
sponges
sea urchin
sea horse
Sponges capture their food by
choanocytes
porocytes
amoebocytes
pinacocytes
If a carmine particle is put on the os~ culum of a living sponge, it will
adhere
rotate
be ingested
none of these
Difference between a sponge and a metazoan is that sponge do not contain
cells
cell organisation
cell division
division of labour
The central cavity of the sponge is also called
ostea
gastral cavity
gut
gullet
Nervous system in sponges
is well developed
is in the form of a network
is made up of several interconnected ganglia
is absent
Sponges capture their food by
pinacocytes
thesocytes
choamocytes
scleroblasts
Phylogenetically, the sponges have evolved from
protozoans
flagellates
choano flagellate
ciliates
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
Collared, flagellated cells covering large parts of the inner chambers of sponges and helping to keep water circulating are
choanocytes
porocytes
pinacocytes
amoebocytes
Larva of sponge is known as
planula larva
amphiblastula larva
trochophore larva
glochidium larva
The gametes in sponges develop from
amoebocytes
archeocytes
choanocytes
myocytes
Sponges are not found in
cold water
sea water
sandy shore
brackish water
The skeleton of sponges is mostly composed of
choanocytes
scleroblasts
pinacocytes
amoebocytes
Path of water in a sponge is
pinacocyte � choanocyte � osculum
osculum > spongocoel � ostia
ostia > spongocoel � osculum
osculum � ostia > spongocoel
What is Euplectella commonly called ?
Glass rope sponge
Venus flower basket
Boring sponge
Commercial bath sponge
The skeleton in sponges is composed of
gemmules
spicules
spongin fibre
trychocysts
Sponges with a skeleton of calcium carbonate belongs to the class
calcarea
demospongia
anthozoa
hexactinellida
The phylum porifera contains most primitive of multicellular animals called
corals
sea pen
comb jellies
sponges