31.  The mouth contains a file-like rasping organ for fooding, called ________ in Mollusco.

A. radulla

B. medulla

C. Gizzard

D. teeth

Answer : Option A

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32.  

Match the following columns and select the correct option.

Column - I                          Column - II

(p)pila                               (i)Devil fish

(q)Dentalium                   (ii)ctsiton

(r)chaetopleura               (iii)Applo smail

(s)octopus                      (iv)Tusk she

A. p - (ii), q - (iii), r - (iii), s - (iv)

B. p - (iii), q - (iv), r - (ii), s - (i)

C. p - (ii), q - (iv), r - (i), s - (iii)

D. p - (i), q - (ii), r - (iii), s - (iv)

Answer : Option B

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33.  In which of the following phyla, while the adult shows radial symmetry, the larva shows bilateral symmetry ?

A. Mollusca

B. Echinodermata

C. Arthropoda

D. Annelida

Answer : Option B

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34.  An excretory system is absent in

A. Sepia

B. Crab

C. Starfish

D. Earthworm

Answer : Option C

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35.  Water vascular system which help in ________

A. Cocomotion

B. capture and transport of food

C. respiration

D. all above

Answer : Option D

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36.  Into how many sub-phylum chordata is divided ?

A. 2

B. 4

C. 6

D. 3

Answer : Option D

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37.  The notochord is replaced by a ________ vertebral column in chordal-G.

A. cartilaginous

B. bony

C. both of a & b

D. none of those

Answer : Option C

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38.  Notochord is present only in larval tail

A. urochordata

B. cephalochordata

C. vertebrata

D. protochordates

Answer : Option A

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39.  Vertebrates have ventral muscular heart with ________ chambers.

A. 2

B. 3

C. 4

D. all of these

Answer : Option D

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40.  .......... have a sucking and circular mouth without jawas.

A. lamprey

B. scoliodon

C. catla

D. rohu

Answer : Option A

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