What are Cry proteins? Name an organism that produces it. How has man exploited this protein to his benefit?

Explanation

### Step-by-Step Solution:

1. **Definition of Cry Proteins**:
- Cry proteins are a type of toxin produced by certain bacteria, specifically Bacillus thuringiensis (Bt). These proteins are primarily known for their insecticidal properties, particularly against various insect larvae.

2. **Organism Producing Cry Proteins**:
- The organism that produces Cry proteins is **Bacillus thuringiensis**. This bacterium synthesizes these proteins as part of its life cycle.

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