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Class 9ScienceWHY DO WE FALL ILL?Mix Example - WHY DO WE FALL ILL?
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Vectors can be defined as

  • A
    microorganisms which cause many diseases
  • B
    animals that carry the infecting agents from a sick person to another healthy person
  • C
    an infected person
  • D
    diseased plants
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Class 9

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WHY DO WE FALL ILL?

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Mix Example - WHY DO WE FALL ILL?

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