Caucasoid (white), Mongoloid (yellow), Negroid (black) and Australoid might have evolved from a common ancestor. Provide a few evidences in support of this view.

Explanation

### Step-by-Step Text Solution:

1. **Introduction to Human Races**:
- The classification of humans into different races such as Caucasoid (white), Mongoloid (yellow), Negroid (black), and Australoid suggests that these groups may have evolved from a common ancestor.

2. **Evidence of Homology**:
- Homology refers to the similarity in structure or function due to shared ancestry. The physical characteristics of these racial groups show similarities that indicate a common origin. For example, all humans share a basic body plan, which includes similar organ systems and skeletal structures.

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