Thd idea not related to the Darwinian theory of evolution is

Options

A. Survival of the fillest
B. Struggle for existence.
C. Inheritance of acquired characters
D. Origin of species by natural selection.

Answer

To answer the question regarding which idea is not related to the Darwinian theory of evolution, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Darwin's Contributions**:
- Charles Darwin is known for his theory of evolution primarily through natural selection. Key concepts include:
- **Natural Selection**: The process where organisms better adapted to their environment tend to survive and produce more offspring.
- **Survival of the Fittest**: A phrase that summarizes the outcome of natural selection, where the fittest individuals are those that survive and reproduce.
- **Struggle for Existence**: The competition among organisms for resources necessary for survival.

2. **Identify the Options**:
- The question presents several ideas, and we need to identify which one does not belong to Darwin's theory. One of the options is "inheritance of acquired characters."

3. **Differentiate Between Darwinism and Lamarckism**:
- **Lamarckism**: Proposed by Jean-Baptiste Lamarck, this theory suggests that organisms can pass on traits acquired during their lifetime to their offspring. For example, if an organism uses a particular organ more, that organ becomes more developed and is then inherited by the next generation.
- **Darwinism**: In contrast, Darwin's theory does not support the idea of inheritance of acquired characteristics. Instead, it emphasizes genetic variation and natural selection.

4. **Conclusion**:
- Since "inheritance of acquired characters" is associated with Lamarckism and not with Darwinism, it is the idea that is not related to the Darwinian theory of evolution.

5. **Final Answer**:
- The idea not related to the Darwinian theory of evolution is **option C: inheritance of acquired characters**.