31. The mouth contains a file-like rasping organ for fooding, called ________ in Mollusco.
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
33. In which of the following phyla, while the adult shows radial symmetry, the larva shows bilateral symmetry ?
34. An excretory system is absent in
35. Water vascular system which help in ________
A. Cocomotion
B. capture and transport of food
C. respiration
D. all above
Answer : Option D
36. Into how many sub-phylum chordata is divided ?
37. The notochord is replaced by a ________ vertebral column in chordal-G.
38. Notochord is present only in larval tail
39. Vertebrates have ventral muscular heart with ________ chambers.
40. .......... have a sucking and circular mouth without jawas.