Zoology
Petromyzon is commonly known as:
A.
Lancet
B.
Hagfish
C.
Acorn worm
D.
Lamprey
Endoskeleton in Cyclostomata is:
A.
Membranous
B.
Bony
C.
Cartilaginous
D.
Absent
In which subphylum of Phylum Chordata are found typical chordates?
A.
Urochordata
B.
Cephalochordata
C.
Hemichordata
D.
None of these
Urochordates are commonly known as:
A.
Sea squids
B.
Sea dollars
C.
Sea squirts
D.
Sea lillies
In Urochordates, the basic chordate characters are present:
A.
Both in larval and adult stages only
B.
In adults only
C.
In larval stage only
D.
None of these
Urochordates are:
A.
Exclusively marine
B.
Found in water or lands
C.
Found in marshy lands
D.
Exclusively fresh water forms
Branchiostoma belongs to:
A.
Cephalochordata
B.
Cyclostomata
C.
Hemichordata
D.
Urochordata
Habitat of Cephalochordata is:
A.
Estuarine water
B.
Exclusively fresh water
C.
Exclusively marine
D.
None of these
Notochord is restricted to the tail region in:
A.
Hemichordata
B.
Urochordata
C.
Cephalochordata
D.
None of these
Among the following which genera emits bright and phosphorescent light?
A.
Clavelina
B.
Pyrosoma
C.
Salpa
D.
None of these
Which of the following classes does herdmania belongs to?
A.
Ascidiacea
B.
Thaliacea
C.
Larvacea
D.
Placodermi
Which of the character exhibits resemblance of Hemichordata with Annelida?
A.
Gill slits
B.
Nerve cord
C.
The vascular system
D.
Larval forms
Notochord is present in larval stages but absent in adults of:
A.
Hemichordates
B.
Urochordates
C.
Cephalochordates
D.
Euchordates
In Cephalochordata the notochord:
A.
Extends along the entire length of the body
B.
Is restricted to the head region
C.
Is restricted to the length of the body excluding the head region
D.
Is present along the entire body length in larva but restricted to head region in adult
Which of the following group consist of exclusively hermaphrodite animals?
A.
Urochordata
B.
Cephalochordata
C.
Hemichordata
D.
Cyclostomata
Which of the following group of protochordates exhibits neoteny?
A.
Enteropneusta
B.
Larvacea
C.
Ascidiacea
D.
Thaliacea
Ceolom in urochordates is:
A.
Pseudocoelomic
B.
Enterocoelomic
C.
Schizocoelomic
D.
Absent
Body is distinguished into proboscis, collar and trunk is:
A.
Herdmania
B.
Amphioxus
C.
Petromyzon
D.
None of these
The larva in hemichordates is:
A.
Trochophore
B.
Tornaria
C.
Ascidian
D.
Bipinnaria
Which of the following is known as "Acorn worm"?
A.
Amphioxus
B.
Balanglossus
C.
Herdmania
D.
Cephalodiseus
Which one of the following is of doubtful status in hemichordates?
A.
Notochord
B.
Nerve cord
C.
Neural tube
D.
Gill clefts
In hemichordates the coelom is:
A.
Absent
B.
Pseudocoelous
C.
Enterocoelous
D.
Haemocoelous
Balanoglossus belongs to class:
A.
Pterobranchia
B.
Larvacea
C.
Planctospheroida
D.
Enteropneusta
Which among the following statements is incorrect regarding echinoderms?
A.
They are among the most common and widely distributed of marine animals
B.
None are microscopic
C.
Body is diploblastic
D.
Respiration occurs through a variety of structures
Heliaster belongs to the class:
A.
Asteroidea
B.
Echinoidea
C.
Crinoidea
D.
None of these