In Rhizopus, the hyphae that absorb nutrients and anchor the mycelium are known as:

Options

A. sporangiophores
B. rhizoids
C. stolon
D. gametangia

Explanation

To solve the question regarding the hyphae in Rhizopus that absorb nutrients and anchor the mycelium, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the specific type of hyphae in Rhizopus responsible for nutrient absorption and anchoring the mycelium.

2. **Identify the Options**: The options provided are:
- Sporangiophores
- Rhizoids
- Stolon
- Gametangia

3. **Evaluate Each Option**:
- **Sporangiophores**: These are structures that produce spores for asexual reproduction. They do not absorb nutrients or anchor the mycelium. Thus, this option can be ruled out.
- **Rhizoids**: These are specialized hyphae that serve to anchor the mycelium to the substrate and are also involved in nutrient absorption. This option fits the description given in the question.
- **Stolon**: These are aerial hyphae that connect different parts of the mycelium and do not primarily serve to anchor or absorb nutrients. Therefore, this option can be ruled out.
- **Gametangia**: These are structures involved in the formation of gametes and do not play a role in nutrient absorption or anchoring. This option can also be ruled out.

4. **Conclusion**: After evaluating all the options, the only correct answer is **Rhizoids**. They are the hyphae in Rhizopus that absorb nutrients and anchor the mycelium.

### Final Answer:
In Rhizopus, the hyphae that absorb nutrients and anchor the mycelium are known as **Rhizoids**.

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