Which characters are present in a vertebrate?

Options

A. Notochord, triploblastic, coelomate and bilateral symmetry
B. Notochord, diploblastic, coelomate and bilateral symmetry
C. Notochord, triploblastic, acoelomate and radial symmetry
D. Notochord, triploblastic, acoelomate and radial symmetry

Explanation

To answer the question "Which characters are present in a vertebrate?", we can break down the characteristics of vertebrates step by step:

### Step 1: Identify the Key Characteristics
Vertebrates possess several key characteristics that distinguish them from other animal groups. The main characteristics include:
1. Notochord
2. Triploblastic organization
3. Coelomate body structure
4. Bilateral symmetry

### Step 2: Explain Each Characteristic
1. **Notochord**:
- The notochord is a rod-like structure that provides support and is present during the development of vertebrates. It is a precursor to the vertebral column (spine) in higher vertebrates.

2. **Triploblastic Organization**:
- Vertebrates are triploblastic, meaning they develop from three germ layers: ectoderm, mesoderm, and endoderm. This organization allows for the development of complex structures and systems in the body.

3. **Coelomate**:
- Vertebrates are coelomates, which means they have a true coelom (body cavity) that is formed from the mesoderm. This body cavity allows for the development of internal organs and provides space for them to function properly.

4. **Bilateral Symmetry**:
- Vertebrates exhibit bilateral symmetry, meaning their bodies can be divided into two equal halves along a single plane. This symmetry is common in many animals and is associated with a more complex body plan.

### Step 3: Evaluate Other Options
- The other options presented in the question contain incorrect characteristics:
- Some mention "diploblastic," which is not applicable to vertebrates as they are triploblastic.
- Others mention "oscillomate" or "radial symmetry," both of which do not apply to vertebrates.

### Conclusion
The correct answer is that vertebrates possess the following characteristics: notochord, triploblastic organization, coelomate structure, and bilateral symmetry.

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