[amp_mcq option1=”Bacillus thurigiensis” option2=”Agrobacterium tumefaciens” option3=”Pseudomonas fluorescens” option4=”None of these” correct=”option2″]
The correct answer is: B. Agrobacterium tumefaciens
Agrobacterium tumefaciens is a Gram-negative, rod-shaped bacterium that is capable of infecting dicotyledonous plants. It is the causal agent of crown gall disease, a plant disease that causes tumors to form on the roots and stems of infected plants.
A. Bacillus thurigiensis is a Gram-positive, rod-shaped bacterium that is used as a biopesticide. It produces a protein called Bt toxin, which is toxic to insects.
C. Pseudomonas fluorescens is a Gram-negative, rod-shaped bacterium that is a common soil bacterium. It is not known to cause any diseases in plants.
D. None of these is the correct answer.