What was the name given to discontinuous variations by Darwin? 

Explanation

**Step-by-Step Solution:**

1. **Understanding Discontinuous Variations**: Discontinuous variations refer to distinct and separate differences observed in organisms. These variations can be large or small and are often the result of genetic differences.

2. **Source of Variations**: The variations arise from small changes in the DNA or chromosomes, which can occur due to errors during DNA replication or environmental factors.

3. **Darwin's Contribution**: Charles Darwin studied variations in organisms and recognized the significance of these differences in the process of evolution.

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