Which organism infects the roots of tobacco plants and causes a significant reduction in yield?

  • A
    Bacillus thuringiensis
  • B
    Meloidogyne incognita
  • C
    Virus
  • D
    Agrobacterium

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The bacterium $Bacillus$ $thuringiensis$ is widely used in contemporary biology as:

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$Bacillus \text{ } thuringiensis$ \text{ } \text{bacteria contain } Bt \text{ } \text{toxin protein crystals. These do not kill the bacteria themselves because:}

Which organism infects tobacco root and decreases its yield?

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