By cross pollinating certain tobacco species, some fertile hybrids were obtained by

Options

A. Mendel
B. Morgan
C. Kolreuter
D. Khorana.

Answer

To solve the question regarding which scientist obtained fertile hybrids by cross-pollinating certain tobacco species, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which scientist was responsible for obtaining fertile hybrids through the cross-pollination of tobacco species.

2. **Analyze the Options**:
- **Mendel**: Known as the father of genetics, Mendel's work was primarily on the garden pea (Pisum sativum), not tobacco. Therefore, he is not the correct answer.
- **Morgan**: Morgan is famous for his work on Drosophila melanogaster (fruit flies) and the concept of linkage. He did not conduct experiments on tobacco species, making him an incorrect choice.
- **Kohlreuter**: Kohlreuter was a pioneer in studying plant fertilization, particularly in tobacco species (Nicotiana). He conducted experiments that involved cross-pollination, which resulted in fertile hybrids. This makes him a strong candidate for the correct answer.
- **Khurana**: Dr. Harkobind Khurana is known for his work on the genetic code and not for plant hybridization or cross-pollination. Thus, he is not the correct answer.

3. **Conclude the Correct Answer**: Based on the analysis, the correct answer is **Kohlreuter**. He was the scientist who obtained fertile hybrids by cross-pollinating certain tobacco species.

### Final Answer:
**Kohlreuter** is the correct answer.

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