Transgenic crops are modified through genetic engineering to develop natural resistance to insct pests. Which of these pairs consits of transgenic crops ?

Options

A. Tobacco and cotton
B. Tomato and rice
C. Mazie and sugarane
D. Tomato and wheat

Answer

To determine which pair consists of transgenic crops, we need to understand what transgenic crops are and identify examples of such crops.

### Step-by-step Solution:

1. **Understand Transgenic Crops**:
Transgenic crops are plants that have been genetically modified using biotechnology to incorporate specific genes that provide desirable traits, such as resistance to pests.

2. **Identify the Role of Bt Genes**:
Many transgenic crops are engineered to include Bt (Bacillus thuringiensis) genes, which produce proteins that are toxic to certain insect pests. This genetic modification helps the crops resist pest damage, leading to higher yields and reduced need for chemical pesticides.

3. **Review the Given Options**:
- Option 1: Tobacco and Corn
- Option 2: Tomato and Rice
- Option 3: Maize and Sugarcane
- Option 4: Tomato and Wheat

4. **Evaluate Each Pair**:
- **Tobacco and Corn**: While tobacco can be genetically modified, it is not primarily known as a transgenic crop for pest resistance. Corn (maize) has transgenic varieties, but this pair does not represent a well-known combination.
- **Tomato and Rice**: Both tomato and rice have well-documented transgenic varieties. Rice, for example, has been modified to be resistant to certain pests, and tomatoes have been engineered for various traits, including pest resistance.
- **Maize and Sugarcane**: Maize is a common transgenic crop, but sugarcane is less commonly associated with genetic modification for pest resistance.
- **Tomato and Wheat**: While tomatoes are transgenic, wheat has not been widely modified for pest resistance compared to other crops.

5. **Select the Correct Pair**:
After evaluating the options, the pair that consists of transgenic crops is **Tomato and Rice** (Option 2).

### Final Answer:
The correct answer is **Tomato and Rice**.

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