Darwin's theory is popularly known as 'theory of natural selection'. How is Lamarck's theory known as?

Explanation

**Step-by-Step Solution:**

1. **Understanding Darwin's Theory**:
- Darwin's theory is widely recognized as the "theory of natural selection." This theory explains how organisms adapt to their environment over generations, with favorable traits being passed down.

2. **Identifying Lamarck's Theory**:
- In contrast to Darwin, Lamarck proposed a different mechanism for evolution. His theory is primarily known as the "theory of inheritance of acquired characters."

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