Sycon belongs to the class
calcarea
porifera
hexactinellida
demospongia
Correct Answer :
A. calcarea
Related Questions
Path of water in a sponge is
pinacocyte � choanocyte � osculum
osculum > spongocoel � ostia
ostia > spongocoel � osculum
osculum � ostia > spongocoel
Nervous system in sponges
is well developed
is in the form of a network
is made up of several interconnected ganglia
is absent
Phylogenetically, the sponges have evolved from
protozoans
flagellates
choano flagellate
ciliates
Sponges capture their food by
pinacocytes
thesocytes
choamocytes
scleroblasts
Ostia are meant to
admit water current
pass out water current
ingest food
excrete waste products
Sponges are not found in
cold water
sea water
sandy shore
brackish water
Sponges with a skeleton of calcium carbonate belongs to the class
calcarea
demospongia
anthozoa
hexactinellida
The commercial bath sponge belongs to
porifera
gatropoda
coelenterata
ctenophora
Asexual reproduction in sponges is by forming buds and
gemmules
spicules
spongin fibres
choanocytes
Animals of phylum porifera are characterised by
diploblastic organisation
coelenteron
canal system
coelom
Sponges capture their food by
choanocytes
porocytes
amoebocytes
pinacocytes
The spongocoel is lined by choanocytes in
Leucosolenia
Sycon
Euspnongia
Grautia
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
Canal system in Leucosolenia is
asconoid
syconoid
leuconoid
rhagon
The scientific name of commercial bath sponge is
Cliona
Hyalonema
Chalina
Euspongia
The skeleton in sponges is composed of
gemmules
spicules
spongin fibre
trychocysts
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
Exogenous budding, a type of asexual reproduction in sponges is known as
gemmulation
gemmation
regeneration
amphimixis
Larva of sponge is known as
planula larva
amphiblastula larva
trochophore larva
glochidium larva
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
Which one of the following is a flagellated larva of Leucosolenia ?
Planula
Parenchymula
Maggot
Kedia
What is Euplectella commonly called ?
Glass rope sponge
Venus flower basket
Boring sponge
Commercial bath sponge
The animal nature of sponges was established by
Robert Grant
Trembly
Robert Brown
Ellias
Lencosolenia is
free living, solitary, marine
free living, fresh water, solitary
free living, colonial, marine
Solitary, colonial, fresh water
The pathway of entring and coming out of water of sponges is
water vascular system
canal system
feeding current
circulating current
Which of the following is given as a gift in Japan?
Hyalonema
Tethya
Euplectalla
Pheronetna
The commercial bath sponge is made up of
siliceous spicules
spongin fibres
collagen fibres
elastic fibres
The phylum porifera contains most primitive of multicellular animals called
corals
sea pen
comb jellies
sponges
Gemmules are helpful in
digestion
sexual reproduction
asexual reproduction
current circulation
The central cavity of the sponge is also called
ostea
gastral cavity
gut
gullet