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 about the form in which food is stored in brown algae, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Brown Algae**: Brown algae belong to the group of algae known as Phaeophyceae. They are primarily found in marine environments and are known for their brown color due to the presence of pigments like fucoxanthin.

2. **Storage of Food in Algae**: Algae, including brown algae, store food in the form of carbohydrates. The type of carbohydrate can vary among different groups of algae.

3. **Identifying the Correct Carbohydrate**: The question specifically asks for the complex carbohydrates stored in brown algae. The options provided include:
- Floridian starch
- Mylopectin and Glycogen
- Laminarin or Mannitol
- Starch and Glycogen

4. **Evaluating Each Option**:
- **Floridian Starch**: This is the storage carbohydrate found in red algae, not brown algae. Therefore, this option is incorrect.
- **Mylopectin and Glycogen**: These carbohydrates are primarily associated with plants and animals. Mylopectin is a form of starch, and glycogen is a storage form of glucose in animals. This option is also incorrect for brown algae.
- **Laminarin or Mannitol**: Laminarin is a polysaccharide that is indeed the primary storage carbohydrate in brown algae. Mannitol is a sugar alcohol that can also be found in some brown algae. This option is correct.
- **Starch and Glycogen**: While starch is a storage form of carbohydrates in some algae, it is not the primary form in brown algae. Hence, this option is also incorrect.

5. **Conclusion**: Based on the evaluation of the options, the correct answer is that in brown algae, food is stored as complex carbohydrates which may be in the form of **Laminarin or Mannitol**.

### Final Answer:
In brown algae, food is stored as complex carbohydrates which may be in the form of **Laminarin or Mannitol**.

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