The two key concepts of Darwinism Theory of Evolution are

Options

A. Branching descent and Natural selections
B. Adaptive radiation and Divergent evolution
C. Natural selection and genetic load
D. Clihes and Demes

Answer

To answer the question regarding the two key concepts of Darwinism Theory of Evolution, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Identify the Key Concepts**: The question asks for the two key concepts of Darwinism. The two main ideas that are central to Darwin's theory are "Natural Selection" and "Descent with Modification" (often referred to as "Branching Descent").

2. **Natural Selection**: This is the process by which organisms that are better adapted to their environment tend to survive and produce more offspring. It is a mechanism that drives evolution by favoring advantageous traits.

3. **Descent with Modification (Branching Descent)**: This concept refers to the idea that species evolve over time from common ancestors, leading to the diversity of life we see today. It emphasizes the branching pattern of evolution where different species arise from a common lineage.

4. **Conclusion**: Therefore, the two key concepts of Darwinism Theory of Evolution are:
- Natural Selection
- Descent with Modification (Branching Descent)

### Final Answer:
The two key concepts of Darwinism Theory of Evolution are:
1. Natural Selection
2. Descent with Modification (Branching Descent)

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