What aspect of organic evolution is represented by the variation in the breeds of domestic pigeon? Give a similar example from the plants.

Explanation

**Step-by-Step Solution:**

1. **Understanding Organic Evolution**: Organic evolution refers to the changes in the genetic makeup of populations over time, leading to the diversity of life forms. It is driven by mechanisms such as natural selection, genetic drift, mutations, and gene flow.

2. **Variation in Domestic Pigeons**: The variation in the breeds of domestic pigeons is a clear representation of artificial selection, which is a form of natural selection. Charles Darwin studied these variations by breeding pigeons with different traits, such as feather color and beak size. This selective breeding resulted in a wide variety of pigeon breeds, showcasing how specific traits can be enhanced or diminished over generations.

3. **Connection to Natural Selection**: The aspect of organic evolution represented by the variation in domestic pigeons is the theory of evolution by natural selection. Through the process of artificial selection, Darwin was able to demonstrate how certain traits could be favored and passed on to future generations, paralleling the natural selection process in the wild.

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