................ and ............ ... jointly proposed the "Theory of Natural Selection".

Explanation

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

1. **Identify the Scientists**: The question asks for the names of the scientists who jointly proposed the "Theory of Natural Selection".

2. **Recall Historical Context**: The theory of natural selection was proposed in the context of evolutionary biology, specifically in the year 1859.

3. **Name the Scientists**: The two scientists who are credited with proposing the theory of natural selection are Charles Darwin and Alfred Russel Wallace.

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