Which one of following tissus is totally missing in hydra ?

Options

A. connective tissue
B. Epithelial tissue
C. muscular tissue
D. nervous tissue

Answer

### Step-by-Step Solution:

1. **Understanding Hydra**: Hydra is a simple organism belonging to the phylum Cnidaria. It is known for its simple body structure and lack of complex organ systems.

2. **Identifying Tissue Types**: There are four main types of tissues in animals:
- Epithelial Tissue
- Connective Tissue
- Muscular Tissue
- Nervous Tissue

3. **Analyzing Each Tissue in Hydra**:
- **Epithelial Tissue**: Hydra has epithelial tissue, which includes a layer of cells that covers its body and lines its digestive cavity.
- **Muscular Tissue**: Hydra possesses muscular tissue, specifically epithelial muscular tissue, which allows it to contract and move.
- **Nervous Tissue**: Hydra has a simple nervous system composed of a net-like arrangement of nerve cells, allowing it to respond to stimuli.

4. **Finding the Missing Tissue**:
- **Connective Tissue**: Hydra does not have connective tissue. This is primarily because it lacks a true circulatory system and blood. Connective tissue is usually associated with the presence of blood and other connective elements, which are absent in Hydra.

5. **Conclusion**: The tissue that is totally missing in Hydra is **Connective Tissue**.

### Final Answer:
**Connective Tissue is totally missing in Hydra.**

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