Which if the following is not applicable for Bt - cotton ?

Options

A. It is a GM plant .
B. It shows insect resistance
C. It has a bacterial gene expressing in its system.
D. It is resistant to all pesticides .

Answer

To determine which of the following statements is not applicable for Bt-cotton, let's analyze each option step by step:

1. **Bt-cotton is a GM plant**:
- Bt-cotton is indeed a genetically modified organism (GMO). It has been genetically engineered to express a gene from the bacterium *Bacillus thuringiensis* (Bt), which provides it with insect resistance.
- **Conclusion**: This statement is applicable.

2. **Bt-cotton shows insect resistance**:
- Bt-cotton has been modified to produce a protein that is toxic to certain insects, particularly those in the order Lepidoptera (e.g., cotton bollworm). This allows the plant to resist damage from these pests.
- **Conclusion**: This statement is applicable.

3. **Bt-cotton has a bacterial gene expressing in its system**:
- The genetic modification of Bt-cotton involves the incorporation of a gene from *Bacillus thuringiensis*, which enables the plant to produce the insecticidal protein. Therefore, this statement is also true.
- **Conclusion**: This statement is applicable.

4. **Bt-cotton is resistant to all pesticides**:
- This statement is incorrect. While Bt-cotton is resistant to certain pests due to the Bt protein, it does not provide resistance to all pesticides. In fact, it can still be affected by herbicides and other non-target pesticides.
- **Conclusion**: This statement is not applicable.

Based on the analysis above, the answer to the question "Which of the following is not applicable for Bt-cotton?" is option 4: "It is resistant to all pesticides."