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Zoology Questions and Answers

37. Blind spot on the retina contains
 
  • A. rods
  • B. cones
  • C. rods and cones
  • D. none of these
 
 
38. Largest known vertebrate is
 
  • A. elephant
  • B. whale
  • C. anaconda
  • D. shark
 
39. AIDS is caused by
 
  • A. virus
  • B. bacteria
  • C. protozoa
  • D. helminth
 
40. ---- occurs due to the deficiency of Vitamin D.
 
  • A. anaemia
  • B. scurvy
  • C. rickets
  • D. pellagra