Name the book in which Lamarckism is mentioned.

Explanation

**Step-by-Step Solution:**

1. **Understand the Concept of Lamarckism**: Lamarckism is a theory of evolution proposed by Jean-Baptiste Lamarck. It suggests that organisms can pass on traits acquired during their lifetime to their offspring.

2. **Identify the Key Features of Lamarckism**: The theory emphasizes that physical changes that occur in an organism during its lifetime can be inherited by the next generation. For example, if an organism develops a certain trait due to environmental factors, that trait can be passed on to its offspring.

3. **Recognize the Limitations of Lamarckism**: While Lamarckism was an early attempt to explain evolution, it has been largely discredited in modern biology. The main reason is that acquired characteristics are not genetically transmitted.

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