Which of the following is incorrect about Lamarckism ?

Options

A. Absence of all of the four limbs amongst snakes.
B. Exceptionally long neck of giraffe.
C. An intellectual parents having a dull daughter.
D. Loss of vision in cave - dwelling mammals.

Answer

To address the question regarding Lamarckism and identify which statement is incorrect, we first need to understand the fundamental principles of Lamarckism. Lamarckism, proposed by Jean-Baptiste Lamarck, is a theory of evolution that suggests that organisms can pass on traits acquired during their lifetime to their offspring. Here’s a step-by-step breakdown of the concepts related to Lamarckism:

### Step 1: Understanding Lamarckism
Lamarckism is based on two main ideas:
1. **Use and Disuse**: Lamarck proposed that body parts that are used extensively become stronger and larger, while those that are not used deteriorate.
2. **Inheritance of Acquired Characteristics**: Traits acquired or lost during an organism's lifetime can be passed on to the next generation.

### Step 2: Identifying Common Misconceptions
There are several common misconceptions about Lamarckism that can help us identify incorrect statements:
- Lamarckism does not account for genetic inheritance as understood in modern genetics.
- It does not explain the role of natural selection, which is a key mechanism of evolution as proposed by Charles Darwin.

### Step 3: Evaluating Statements
To determine which statement about Lamarckism is incorrect, we would evaluate statements that may include:
- "Lamarckism states that acquired traits can be inherited."
- "Lamarckism emphasizes natural selection as a mechanism of evolution."
- "Lamarckism suggests that organisms can evolve based on their needs."
- "Lamarckism is based on the idea of use and disuse."

### Step 4: Conclusion
From the evaluation, the statement that emphasizes natural selection as a mechanism of evolution would be incorrect concerning Lamarckism, as this concept is primarily associated with Darwinian evolution.

### Final Answer
The incorrect statement about Lamarckism is: "Lamarckism emphasizes natural selection as a mechanism of evolution."

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