All related species are kept under

Options

A. One common genus
B. Different genus due to different evolutionary courses
C. Various groups according to the similarities and differences
D. Different higher taxa on basis of morphological differences

Answer

To answer the question "All related species are kept under," we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Species**:
- A species is defined as a group of living organisms that are similar and capable of interbreeding. This means that members of the same species can reproduce and produce fertile offspring.

2. **Identify the Characteristics of Species**:
- Species are characterized by their ability to interbreed and exchange genes. They are also reproductively isolated from other species, meaning they do not breed with members of different species.

3. **Review Biological Classification**:
- Biological classification is hierarchical. The order is as follows: Kingdom, Phylum, Class, Order, Family, Genus, and Species. Each level groups organisms based on shared characteristics.

4. **Focus on the Genus Level**:
- The genus is a taxonomic rank that groups together species that are closely related. Therefore, all species that share common characteristics and can interbreed are classified under the same genus.

5. **Select the Correct Answer**:
- Given the options provided, the correct answer to the question is that "all related species are kept under one common genus."

### Final Answer:
All related species are kept under one common genus.

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