Coelenteron of hydra serves the double purpose of

Options

A. digestion and circulartion
B. digestion and storage
C. excretion and locomotion
D. circulation and storage

Answer

### Step-by-Step Solution:

1. **Understanding Coelenteron**: The coelenteron is the internal cavity of the hydra, which is a type of cnidarian. It is also referred to as the gastrovascular cavity.

2. **Functions of Coelenteron**: The coelenteron serves two primary functions:
- **Digestion**: It is the site where food is broken down and nutrients are absorbed. Hydra has a single opening that serves as both the mouth and the anus, allowing for the ingestion of food and the expulsion of waste through the same opening.
- **Circulation**: Although hydra lacks a circulatory system like that found in higher animals, the coelenteron facilitates the transport of nutrients and gases (like oxygen) throughout the body via water movement within the cavity.

3. **Conclusion**: Therefore, the coelenteron of hydra serves the double purpose of **digestion and circulation**.