Crown gall disease is caused by which type of organism?

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Multiple Choice

Crown gall disease is caused by which type of organism?

Explanation:
Crown gall disease is caused by a bacterium. Affected plants grow tumor-like galls at the crown or near wound sites because the bacterium transfers a piece of DNA from its Ti plasmid into plant cells, triggering uncontrolled cell growth and gall formation. This is a bacterial pathogen, not a fungus, virus, or nematode, so those other organisms do not cause crown gall.

Crown gall disease is caused by a bacterium. Affected plants grow tumor-like galls at the crown or near wound sites because the bacterium transfers a piece of DNA from its Ti plasmid into plant cells, triggering uncontrolled cell growth and gall formation. This is a bacterial pathogen, not a fungus, virus, or nematode, so those other organisms do not cause crown gall.

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