Two key concepts of Darwinian theory of evolution are

Answer

**Step-by-Step Text Solution:**

1. **Introduction to Darwinian Theory**: The Darwinian theory of evolution, proposed by Charles Darwin, explains how species evolve over time through natural processes.

2. **Key Concept 1: Natural Selection**: One of the primary concepts of Darwinian evolution is "natural selection." This process occurs when individuals with traits that are better suited for their environment tend to survive and reproduce more than those with less advantageous traits. Over time, this leads to the adaptation of species to their environment.

3. **Key Concept 2: Inheritance of Traits**: The second key concept is the idea that adaptive traits are inherited. This means that the characteristics that enhance survival and reproduction can be passed down to future generations. The genetic basis of these traits is crucial for the process of evolution, as it allows for variation within a population that can be acted upon by natural selection.

4. **Conclusion**: In summary, the two key concepts of Darwinian theory of evolution are:
- Natural Selection: The process by which individuals with favorable traits are more likely to survive and reproduce.
- Inheritance of Traits: The transmission of advantageous traits from parents to offspring, which contributes to the evolution of species over time.

---