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

Options

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

Explanation

To solve the question regarding which phenomenon supports Darwin's concept of natural selection in organic evolution, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Natural Selection**: Begin by defining natural selection. It is a mechanism proposed by Charles Darwin, which states that individuals in a population exhibit variations, and those with beneficial variations are more likely to survive and reproduce.

2. **Identify Variations in Populations**: Recognize that in any given population, there are variations among individuals. Some of these variations may enhance an organism's ability to survive in its environment.

3. **Evaluate the Options**: Look at the provided options one by one to see which one aligns with the principles of natural selection:
- **Option A**: Development of transgenic animals - This involves genetic engineering and does not involve natural selection.
- **Option B**: Production of Dolly the sheep by cloning - Cloning is a biotechnological process and does not relate to natural selection.
- **Option C**: Prevalence of pesticide-resistant insects - This illustrates natural selection, as insects that survive pesticide exposure reproduce, leading to a population that is resistant.
- **Option D**: Development of organs from stem cells - This is a result of biotechnology and does not involve natural selection.

4. **Select the Correct Option**: Based on the evaluation, option C (Prevalence of pesticide-resistant insects) is the correct answer as it exemplifies natural selection. The insects that survive the pesticide exposure reproduce, leading to an increase in the frequency of the resistant trait in the population.

5. **Conclude**: The phenomenon of pesticide resistance in insects is a clear example of natural selection in action, demonstrating how advantageous traits become more common in a population over generations.

### Final Answer:
**C. Prevalence of pesticide-resistant insects**