Which of the following is a wrong statement about organic evolution ?

Options

A. (a) Fitness is the end result of the ability to adapt and get selected by nature.
B. (b) Natural selection and adaptive radiation are the two key concepts of Darwinian theory
C. (c) When we describe the story of life on earth we treat evolution as a consequence of a process called natural selection.
D. (d) Nature selects for fitness based on characteristics which are inherited.

Answer

To solve the question regarding which statement about organic evolution is wrong, we will analyze each option provided in the context of organic evolution principles.

### Step-by-Step Solution:

1. **Understanding Organic Evolution**:
- Organic evolution refers to the gradual development of organisms over time through changes in their genetic composition. It is influenced by factors such as natural selection and environmental changes.

**Hint**: Recall the definition of organic evolution and its key components.

2. **Evaluating Each Statement**:
- **Option A**: "Fitness is the end result of the ability to adapt and get selected by nature."
- This statement is correct. Fitness refers to an organism's ability to survive and reproduce in its environment, which is a fundamental concept in natural selection.

**Hint**: Think about how fitness relates to survival and reproduction in the context of evolution.

- **Option B**: "Natural selection and adaptive radiation are the two key concepts of Darwinian theory."
- This statement is incorrect. While natural selection is a key concept of Darwinian theory, adaptive radiation is not one of the primary concepts. Instead, the theory of use and disuse by Lamarck is also considered in discussions of evolution, but it is not part of Darwin's theory.

**Hint**: Consider the main theories proposed by Darwin and Lamarck and how they differ.

- **Option C**: "When we describe the story of life on earth, we treat evolution as a consequence of a process called natural selection."
- This statement is correct. Natural selection is indeed viewed as a primary mechanism driving the process of evolution.

**Hint**: Reflect on how natural selection contributes to the overall narrative of evolution.

- **Option D**: "Nature selects for fitness based on the characteristics which are inherited."
- This statement is also correct. Evolutionary changes are based on inherited traits that affect an organism's fitness.

**Hint**: Think about the role of heredity in evolution and how traits are passed down.

3. **Conclusion**:
- After evaluating all options, we find that **Option B** is the wrong statement regarding organic evolution. The correct key concepts of Darwinian theory are natural selection and the idea of inheritance of traits, not adaptive radiation.

### Final Answer:
The wrong statement about organic evolution is **Option B**.