Which of the following evidences does not favour the lamarckian concept of inheritance of acquired characters?

Options

A. Lack of pigment in cave-dwelling animals
B. Melanization in peppered moth
C. Absence of limbs in snakes
D. Presence of webbed toes in auatic birds.

Answer

To answer the question "Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Lamarck's Theory**:
- Lamarck's theory is based on the idea of inheritance of acquired characteristics, where traits acquired during an organism's lifetime can be passed on to its offspring. This is primarily influenced by the use and disuse of organs.

2. **Analyzing the Options**:
- **Option A: Lack of pigment in cave-dwelling animals**:
- Cave-dwelling animals are not exposed to light, leading to a lack of pigmentation. This can be seen as an acquired characteristic due to disuse of pigment-producing organs, thus supporting Lamarck's theory.

- **Option B: Melanization in peppered moths**:
- The melanization of peppered moths is a result of natural selection, where individuals with darker coloration had a survival advantage in polluted environments. This does not support Lamarck's theory, as it is not an acquired characteristic but rather a genetic adaptation.

- **Option C: Absence of limbs in snakes**:
- Snakes have lost their limbs over time due to disuse. This aligns with Lamarck's theory, as the absence of limbs can be seen as an acquired characteristic from their ancestors who used limbs less frequently.

- **Option D: Presence of webbed toes in aquatic birds**:
- Webbed toes in aquatic birds are adaptations that enhance swimming ability, which can be viewed as a modification due to the use of these structures. This also supports Lamarck's theory.

3. **Conclusion**:
- The option that does not favor the Lamarckian concept of inheritance of acquired characters is **Option B: Melanization in peppered moths**. This is an example of natural selection rather than an acquired characteristic.

### Final Answer:
**Option B: Melanization in peppered moths** does not favor the Lamarckian concept of inheritance of acquired characters.

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