“Specific Bt Toxin gene is incorporated into cotton plant so as to control infestation of Bollworm”. Mention the organism from which the gene was isolated and explain its mode of action.

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism:**
The specific Bt toxin gene used to control the infestation of bollworms in cotton plants is isolated from the bacterium known as *Bacillus thuringiensis* (Bt).

2. **Explain the Mode of Action:**
- The *Bacillus thuringiensis* bacterium produces the Bt toxin in an inactive form.
- When the bollworm ingests the cotton plant that has been genetically modified to express this Bt toxin, the toxin enters the gut of the bollworm.
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