Chordata includes all except -

Options

A. Urochordata
B. Hemichordata
C. Cephalochordata
D. Vertebrata

Answer

To solve the question "Chordata includes all except -", we need to identify which option does not belong to the phylum Chordata. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understand the Phylum Chordata**:
- Chordata is a phylum that includes animals with a notochord, which is a flexible rod that provides support. This phylum is divided into several subphyla, including Vertebrata (vertebrates) and non-vertebrate groups.

2. **Identify the Subphyla of Chordata**:
- The main subphyla of Chordata are:
- **Urochordata (or Tunicata)**: These are marine animals that have a notochord only in their larval stage.
- **Cephalochordata**: These are small, fish-like animals that retain the notochord throughout their life.
- **Vertebrata**: This group includes animals with a backbone or vertebral column.

3. **Determine the Non-Chordate Options**:
- The question likely provides options that include various animal groups. We need to identify which one does not belong to the Chordata phylum.

4. **Analyze the Options**:
- If the options include groups such as Urochordata, Cephalochordata, and Vertebrata, we need to find the one that is not a part of Chordata. For example, if an option is something like "Invertebrates" or "Arthropoda," these would not belong to Chordata.

5. **Conclude the Odd One Out**:
- Based on the analysis, the option that does not belong to the phylum Chordata would be the one that represents a different group of animals, such as "Invertebrates" or any other non-chordate group.

### Final Answer:
The correct answer is the option that represents a non-Chordate group (like "Invertebrates").

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