In brown algae, food is stored as complex carbohydrates which may be in the form of `:`

Options

A. floridean starch
B. amylopectin and glycogen
C. laminarin or mannitol
D. starch and glycogen

Answer

To answer the question, "In brown algae, food is stored as complex carbohydrates which may be in the form of:", we need to analyze the characteristics of brown algae and the types of carbohydrates they store.

### Step-by-Step Solution:

1. **Identify the Type of Algae**:
- Brown algae belong to the class Pheophyceae. They are primarily found in marine environments and are characterized by their brown color due to the presence of the pigment fucoxanthin.

2. **Understand the Storage of Food**:
- Algae, including brown algae, store food in the form of carbohydrates. The specific types of carbohydrates stored can vary among different classes of algae.

3. **Focus on Brown Algae**:
- In brown algae, the primary forms of stored food are complex carbohydrates. The most significant ones are laminarin and mannitol.

4. **Eliminate Incorrect Options**:
- Fluoridine starch is associated with red algae (Rhodophyceae).
- Amylopectin and glycogen are not specifically noted as storage forms in brown algae.
- Starch and glycogen are also not the correct forms for brown algae.

5. **Conclude with the Correct Answer**:
- The correct forms of complex carbohydrates in which food is stored in brown algae are laminarin and mannitol.

### Final Answer:
In brown algae, food is stored as complex carbohydrates which may be in the form of **laminarin and mannitol**.

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