Both intracellular and extracellular digestion occur in

Options

A. Hydra
B. Eathworm
C. Paramecium
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding Digestion Types**:
- **Intracellular Digestion**: This type of digestion occurs within the cells. Organisms that perform intracellular digestion engulf food particles into their cells and break them down using enzymes.
- **Extracellular Digestion**: This type occurs outside the cells. Organisms secrete enzymes into their digestive cavity or environment to break down food before absorbing the nutrients.

2. **Analyzing the Options**:
- **Hydra**: Hydra is a simple aquatic organism that has a gastrovascular cavity. It performs both intracellular and extracellular digestion. It captures prey using its tentacles, and the food is digested both inside its cells and in the cavity.
- **Earthworm**: Earthworms primarily utilize extracellular digestion. They have a complete digestive system where food is broken down outside the cells in the digestive tract.
- **Paramecium**: Paramecium is a single-celled organism that performs intracellular digestion. It takes in food through a process called phagocytosis, where food particles are engulfed into food vacuoles and digested inside the cell.

3. **Conclusion**:
- Based on the analysis, only Hydra exhibits both types of digestion: intracellular and extracellular. Therefore, the correct answer to the question is **Hydra**.

**Final Answer**: Hydra

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