Hydra can digest all types of food except

Options

A. (a) proteins
B. (b) fats
C. (c) starch
D. (d) simple sugars

Answer

### Step-by-Step Solution:

1. **Identify the Organism**: The question asks about Hydra, which is a member of the phylum Cnidaria in the animal kingdom.

2. **Understand Hydra's Digestive Capabilities**: Hydra is capable of digesting various types of food, including proteins, fats, and simple sugars. This is due to the presence of specific enzymes in its digestive system.

3. **List the Enzymes Present**: Hydra has lipases (which break down fats), proteases (which break down proteins), and some amount of amylase (which can break down simple sugars).

4. **Identify the Limitation**: While Hydra can digest simple sugars, it lacks advanced forms of amylase that are necessary to break down complex carbohydrates, specifically starch.

5. **Conclude the Answer**: Therefore, the type of food that Hydra cannot digest is starch.

### Final Answer:
Hydra can digest all types of food except starch.

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