The digestion in Hydra is

Options

A. Extracellular
B. Intracellular
C. Extracellular and intracellular
D. Holozoic

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about the digestion process in Hydra, which is a genus of small, freshwater organisms belonging to the class Hydrozoa.

2. **Understand the Digestion Process**: Digestion in Hydra occurs in two distinct phases:
- **Extracellular Digestion**: This is the first phase where digestion occurs outside the cells. In Hydra, this happens in the gastrovascular cavity, where enzymes break down food into smaller particles.
- **Intracellular Digestion**: This is the second phase where the smaller particles from the extracellular digestion are absorbed into the cells of the endodermis (the inner layer of the body wall) and digested further.

3. **Sequence of Digestion**: The correct sequence of digestion in Hydra is:
- First, extracellular digestion occurs in the gastrovascular cavity.
- Second, intracellular digestion occurs within the cells of the endodermis.

4. **Select the Correct Option**: Based on the understanding of the two phases of digestion, the correct answer is that digestion in Hydra involves both extracellular and intracellular phases, specifically in that order.

**Final Answer**: The digestion in Hydra is extracellular followed by intracellular.

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