In lichens, the nonstalked, noncorticated, detachable powdery masses containing few algal cells and closely covered by fungal hyphae are called

Options

A. soredia
B. gonidia
C. sporangiophore
D. metulae

Answer

To solve the question regarding the structure in lichens that is described as nonstalked, noncorticated, detachable powdery masses containing few algal cells and closely covered by fungal hyphae, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Composition of Lichens**:
- Lichens are symbiotic associations between fungi and photosynthetic partners, which can be algae or cyanobacteria.

2. **Identify the Structure Described**:
- The question specifies a structure that is nonstalked, noncorticated, and detachable. This indicates that it is not a typical part of the lichen body (thallus) but rather a reproductive structure.

3. **Recognize the Role of Fungal Hyphae**:
- The fungal component of the lichen surrounds and protects the algal cells, which are responsible for photosynthesis.

4. **Define the Key Terms**:
- "Nonstalked" refers to a structure that does not have a stalk.
- "Noncorticated" means it does not have a cortex or outer layer.
- "Detachable" indicates that this structure can be separated from the main body of the lichen.

5. **Identify the Correct Structure**:
- The structure that fits this description is called **soredia**. Soredia are small, powdery masses that contain both fungal hyphae and algal cells, and they serve as a means of asexual reproduction in lichens.

6. **Conclude the Answer**:
- Therefore, the answer to the question is **soredia**.

### Final Answer:
- The nonstalked, noncorticated, detachable powdery masses containing few algal cells and closely covered by fungal hyphae in lichens are called **soredia**.