Regeneration of hydra is

Options

A. Morphollaxis by interstitial cells
B. Epimorphosis by interstitial cells
C. Epimorphosis by archaeocytes
D. Epimorphosis by grandular cells

Answer

**Step-by-Step Solution:**

1. **Understanding Regeneration**: Begin by defining what regeneration means in biological terms. Regeneration is the process by which organisms replace or restore lost or damaged parts.

2. **Identifying Types of Regeneration**: There are two main types of regeneration mentioned: Morpholaxis and Epimorphosis.
- **Morpholaxis**: This refers to the regeneration of an entire organism from a small fragment by reorganizing existing cells.
- **Epimorphosis**: This involves the regeneration of a specific part of an organism.

3. **Analyzing Hydra's Regeneration**: Hydra is known for its remarkable regenerative abilities. When a Hydra is cut into pieces, each piece can regenerate into a complete organism.

4. **Determining the Mechanism**: In Hydra, the regeneration process is primarily carried out by interstitial cells. These cells are responsible for the morphogenetic processes that lead to the formation of new tissues.

5. **Conclusion**: Based on the definitions and the specific case of Hydra, we conclude that the regeneration of Hydra is classified as Morpholaxis, specifically occurring through the action of interstitial cells.

**Final Answer**: The regeneration of Hydra is Morpholaxis by interstitial cells.

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