The most important character of chordata is

Options

A. Dorsal hollow nervous system
B. Vertebral column
C. Kidneys
D. None of the above

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Phylum Chordata**: Chordata is a phylum within the kingdom Animalia. It includes a diverse group of animals that share certain key characteristics.

2. **Identifying Key Characteristics**: The most important characteristics of Chordata include:
- Presence of a notochord
- Pharyngeal gill slits
- Hollow dorsal nerve cord
- Post-anal tail

3. **Focusing on the Most Important Character**: Among these characteristics, the presence of the **hollow dorsal nerve cord** is often highlighted as a defining feature of the phylum Chordata. This nerve cord is located dorsally (toward the back) and is hollow, distinguishing it from other animal phyla.

4. **Evaluating the Options**:
- **Option 1: Dorsal hollow nerve cord** - This is indeed a key characteristic of Chordata.
- **Option 2: Vertebral column** - This is specific to vertebrates, a subphylum of Chordata, but not all chordates possess a vertebral column.
- **Option 3: Kidney** - Kidneys are found in many animal groups, including non-chordates, and are not unique to Chordata.
- **Option 4: None of the above** - This option is incorrect as we have identified a correct characteristic.

5. **Conclusion**: The most important character of Chordata is the **dorsal hollow nerve cord**. Therefore, the correct answer is **Option 1**.

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