Which cannot be explained by Lamarckism ?

Options

A. Elongated of neck of giraffe.
B. Loss of tail in human being.
C. Weak progeny of nobel laureate.
D. None of these

Answer

To determine which option cannot be explained by Lamarckism, we need to understand the key principles of Lamarck's theory. Lamarckism, proposed by Jean-Baptiste de Lamarck, is based on the idea of inheritance of acquired characteristics and the use and disuse of organs.

### Step-by-Step Solution:

1. **Understand Lamarckism**:
- Lamarckism is a theory that suggests that organisms can pass on traits acquired during their lifetime to their offspring. It emphasizes the role of the environment and the use or disuse of certain organs.

2. **Analyze the Options**:
- **Option A: Elongated neck of giraffe**: This can be explained by Lamarckism. According to Lamarck, giraffes stretched their necks to reach higher leaves, leading to the development of longer necks over generations.
- **Option B: Loss of tail in human beings**: This can also be explained by Lamarckism. Humans may have lost their tails due to disuse over generations, which aligns with Lamarck's theory of use and disuse.
- **Option C: Weak progeny of Nobel laureates**: This cannot be explained by Lamarckism. Lamarck's theory does not account for the inheritance of traits related to intelligence or ability based on the achievements of parents. It focuses on physical traits acquired through environmental interactions, not on the internal characteristics or capabilities of progeny.
- **Option D: Anomalies**: This can be explained by Lamarckism as anomalies can arise from environmental factors affecting the organism during its lifetime.

3. **Conclusion**:
- The option that cannot be explained by Lamarckism is **Option C: Weak progeny of Nobel laureates**.

### Final Answer:
**Option C: Weak progeny of Nobel laureates cannot be explained by Lamarckism.**

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