Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution?

Options

A. Development of transgenic animals
B. Production of ' Dolly' ,the sheep by cloning
C. Prevalence of pesticide resistant insects
D. Development of organs from 'stem cells' for organs transplantation

Explanation

To determine which phenomenon supports Darwin's concept of natural selection in organic evolution, we can analyze the options provided.

### Step-by-Step Solution:

1. **Understanding Natural Selection**:
- Natural selection is a process where organisms better adapted to their environment tend to survive and produce more offspring. This leads to the evolution of species over time.

2. **Analyzing the Options**:
- **Option 1: Development of transgenic animals**: This process involves genetic engineering and does not occur naturally. It is an artificial method and does not support natural selection.
- **Option 2: Production of Dolly the sheep (cloning)**: Cloning is also an artificial process and does not represent natural selection as it does not involve the survival of the fittest in a natural environment.
- **Option 3: Development of organs from stem cells for organ transplantation**: This is a biotechnological advancement and does not relate to natural selection, as it is not a natural evolutionary process.
- **Option 4: Prevalence of pesticide-resistant insects**: This phenomenon is a clear example of natural selection. When pesticides like DDT are used, some insects may have mutations that make them resistant. These resistant insects survive and reproduce, leading to a greater proportion of resistant individuals in the population over time.

3. **Conclusion**:
- The phenomenon that supports Darwin's concept of natural selection in organic evolution is the **prevalence of pesticide-resistant insects**. This example illustrates how environmental pressures can lead to changes in population dynamics based on survival advantages.

### Final Answer:
The correct answer is **prevalence of pesticide-resistant insects**.