Which one of the following animals possesses high regeneration capacity?

Options

A. Planaria
B. Taenia
C. Salpa
D. Periplaneta

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which animal possesses a high regeneration capacity. Regeneration refers to the ability of an organism to regrow lost body parts or to reproduce from fragments of its body.

2. **Analyzing the Options**: The options provided are:
- Option 1: Planaria
- Option 2: Tyria
- Option 3: Salpa
- Option 4: Periplaneta (Cockroach)

3. **Identifying the Correct Answer**: Among the options, Planaria is known for its remarkable ability to regenerate. Planarians are free-living flatworms (Platyhelminthes) that can regenerate any part of their body, including the brain. If a Planarian is cut into pieces, each piece can develop into a new organism.

4. **Understanding the Mechanism of Regeneration**: The regeneration in Planaria is facilitated by specialized cells, particularly stem cells, which can differentiate into various cell types. When a Planarian is cut, these stem cells proliferate and organize themselves to form the missing body parts in a systematic manner.

5. **Distinguishing from Other Options**: The other options (Tyria, Salpa, and Periplaneta) do not exhibit the same level of regeneration capacity as Planaria. For instance, Taenia (tapeworm) and Salpa (a type of tunicate) do not regenerate lost parts effectively, and Periplaneta (cockroach) has limited regenerative abilities compared to Planaria.

6. **Conclusion**: Based on the analysis, the animal that possesses high regeneration capacity is Planaria (Option 1).

**Final Answer**: Option 1: Planaria

---