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

Options

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

Answer

To determine which statement about organic evolution is incorrect, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding Organic Evolution**:
- Organic evolution refers to the changes in living organisms over generations, leading to the diversity of life we see today. It is based on the idea that all living organisms have descended from common ancestors, with modifications occurring over time.

2. **Evaluating Each Statement**:
- **Statement 1**: "Fitness is the end result of the ability to adapt and get selected by nature."
- This statement is correct. Fitness in evolutionary terms refers to an organism's ability to survive and reproduce in its environment, which is indeed a result of adaptation and natural selection.

- **Statement 2**: "Natural selection and adaptive radiation are the two key concepts of Darwinian theory."
- This statement is incorrect. The two key concepts of Darwinian theory are natural selection and branching descent (or common descent), not adaptive radiation. Adaptive radiation is a process that can occur as a result of natural selection, but it is not one of the foundational concepts of Darwin's theory.

- **Statement 3**: "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 a key mechanism that drives evolution, making this statement true.

- **Statement 4**: "Nature selects for fitness based on characteristics which are inherited."
- This statement is also correct. Inherited traits that enhance survival and reproduction are indeed selected by nature, contributing to the fitness of an organism.

3. **Conclusion**:
- After evaluating all statements, we find that Statement 2 is the incorrect statement regarding organic evolution. Therefore, the answer to the question is **Statement 2**.