How many of the dipteran insects given in box are killed by the proteins produced form Bt bacterium
Budworm, armyworm, Flies, mosquitoes

Options

A. One
B. Two
C. Three
D. Four

Answer

To solve the question regarding how many of the dipteran insects listed are killed by the proteins produced from the Bt bacterium, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Insects Listed**: The insects mentioned are budworm, armyworm, flies, and mosquitoes.

2. **Understand the Term "Dipteran"**: Dipteran insects are characterized by having two wings. Common examples include flies and mosquitoes. Budworms and armyworms are not dipterans; they belong to the order Lepidoptera.

3. **Know the Effect of Bt Toxin**: The proteins produced by the bacterium Bacillus thuringiensis (Bt) are specifically toxic to certain insects. The Bt toxin is effective against some Lepidopteran insects (like budworms and armyworms) but not against dipterans.

4. **Identify Which Insects Are Affected**: From the list:
- Budworm: Not a dipteran (Lepidoptera)
- Armyworm: Not a dipteran (Lepidoptera)
- Flies: Dipteran
- Mosquitoes: Dipteran

5. **Count the Dipteran Insects**: The dipteran insects from the list are flies and mosquitoes. Therefore, there are 2 dipteran insects that are affected by the Bt proteins.

6. **Conclusion**: The answer to the question is that 2 of the dipteran insects (flies and mosquitoes) are killed by the proteins produced from the Bt bacterium.

### Final Answer:
**2**