Zoology
Which one of the following sponges has megascleres embedded in spongin fibres?
A.
Spongilla
B.
Sycon
C.
Euplectella
D.
Tethya
Pheronoma is commonly known as:
A.
Glass rope sponge
B.
Bath sponge
C.
Bowl sponge
D.
Horse sponge
Zoochlorellae can be found in:
A.
Hippospongia
B.
Euspongia
C.
Spongilla
D.
Halichondria
Which of the following is not common to all porifers?
A.
Perforated body
B.
Choanocytes
C.
Mesoglea
D.
Spongin fibres
Sponges are considered to show an advancement over protozoa because:
A.
They have a large multicellular body
B.
They have a triploblastic body
C.
They have a pseudocoel
D.
They have spicules
Glass sponges belong to the class:
A.
Dermospongea
B.
Tetractinellida
C.
Calcarea
D.
Hexactinellida
Which is known as "Dead man's finger"?
A.
Chalina
B.
Spongilla
C.
Euspongia
D.
Halichondria
Which of the folk wing exhibits a commensal association with shrimps?
A.
Spongilla
B.
Chalina
C.
Cliona
D.
Euplectella
Poriferans belonging to class Hexactinellida are:
A.
Exclusively marine
B.
Exclusively fresh water
C.
Both marine and fresh water
D.
Terrestrial
The commercial bath sponge, Euspongia belongs to the subclass:
A.
Keratosa
B.
Tetractinellida
C.
Monosxodina
D.
Heteroceola
Which of the following is not a sponge?
A.
Euspongia
B.
Proterospongia
C.
Spongilla
D.
Cliona
The larval form found in phylum porifera is called:
A.
Bipinnaria
B.
Planula
C.
Amphiblastula
D.
Olynthus
Leuconoid canal system is present in:
A.
Euspongia
B.
Leucosolenia
C.
Grantia
D.
Euplectella
In Euplectella the spicules are:
A.
One rayed
B.
Three rayed
C.
Four rayed
D.
Six rayed
Ciliona (boring sponge) belongs to:
A.
Tetractinellida
B.
Hexactinellida
C.
Monoaxonida
D.
Keratosa
Hyalonema belongs to:
A.
Hexactinellida
B.
Calcarea
C.
Demospongiae
D.
Sclerospongiae
Canal system in porifera serves the function of:
A.
Nutrition
B.
Reproduction
C.
Respiration
D.
All of these
Phylum porifera is characterised by the absence of:
A.
Sexual reproduction
B.
Skeletal system
C.
Locomotory organelles
D.
Power of regeneration
Which of the following subclass of sponges is characterised by the presence of spongin only?
A.
Tetractinellida
B.
Hexactinellida
C.
Monoaxonida
D.
Keratosa
Animals belonging to phylum proifera are characterised by the possession of:
A.
Solenocytes
B.
Nematocysts
C.
Chondriocytes
D.
Choanocytes
Sponges are classified on the basis of:
A.
Reproduction
B.
Nervous system
C.
Cellular organisation
D.
Skeletal system
Noctiluca belongs to class:
A.
Rhizopoda
B.
Sporozoa
C.
Ciliata
D.
Mastigophora
Which one is not a type of pseudopodia?
A.
Filopodia
B.
Parapodia
C.
Axopodia
D.
Lobopodia
Which is true for all protozoans?
A.
Absence of skeleton
B.
Unicellular body
C.
Marine habitat
D.
Sexual reproduction
Colonympha is a:
A.
Symbiotic protozoan
B.
Hyperparasitic protozoan
C.
Endoparasitic protozoan
D.
Planktonic protozoan