Question : Which of the following bacterium causes crown gall diseases in plants?
Option 1: Bacillus thurigiensis
Option 2: Agrobacterium tumefaciens
Option 3: Pseudomonas fluorescens
Option 4: None of these
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Correct Answer: Agrobacterium tumefaciens
Solution : The correct option is Agrobacterium tumefaciens .
Crown gall disease in plants is caused by the bacterium Agrobacterium tumefaciens . This disease is distinguished by the development of tumor-like growths or galls on the stems, roots, and occasionally leaves of diverse plant species. The bacteria inserts a piece of its DNA, known as T-DNA, into plant cells, causing uncontrolled cell proliferation and gall formation.
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Question : Which of the following is responsible for transport of food and other substances in plants ?
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Question : Which of the following micro-organism causes diseases like polio and chicken pox ?
Question : Direction: Which one of the given responses is the meaningful order of the following?
1. Fruit 2. Pollen 3. Corolla 4. Stamen
1. Infancy 2. Adult 3. Puberty 4. Childhood
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