Which of the following statements is incorrect regarding the modern taxonomy ?

Options

A. It deals with biological species.
B. It is based on the study of all types of variations in the species.
C. Species is considered to be static.
D. It has a bioystematic concept.

Explanation

To determine which statement is incorrect regarding modern taxonomy, we can analyze each option provided in the question step by step.

### Step 1: Understand the Definition of Modern Taxonomy
Modern taxonomy is the science of classifying organisms based on their characteristics, relationships, and variations. It includes classification, nomenclature, descriptions, and identification of species.

### Step 2: Evaluate Each Statement
1. **Statement 1: It deals with biological species.**
- This statement is correct. Modern taxonomy indeed focuses on biological species and their classification.

2. **Statement 2: It is based on the study of all types of variations in the species.**
- This statement is also correct. Taxonomy involves studying variations among species, which helps in understanding their classification.

3. **Statement 3: Species is considered to be static.**
- This statement is incorrect. According to Darwin's theory of evolution, species are not static; they change over time due to natural selection and other evolutionary processes.

4. **Statement 4: It is a biosystematic concept.**
- This statement is correct. Modern taxonomy is indeed a biosystematic concept as it studies the diversity of organisms and their relationships.

### Step 3: Identify the Incorrect Statement
From the evaluation, the statement that claims "species is considered to be static" is incorrect. Species are dynamic and subject to change over time.

### Conclusion
The incorrect statement regarding modern taxonomy is: **"Species is considered to be static."**

---