How does Darwin's theory of Natural Selection explain the appearance of new forms of life on earth ?

Explanation

**Step-by-Step Solution:**

1. **Introduction to Darwin's Theory**:
- Darwin's theory of natural selection is a fundamental concept in understanding evolution. It explains how new forms of life appear through a process of adaptation and survival over generations.

2. **Key Concepts**:
- The two main concepts of Darwin's theory are **branching descent** and **natural selection**.
- Branching descent refers to the idea that all species have evolved from common ancestors over time, leading to a branching tree of life.
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