An example in which reproductive structues lack a layer of sterile vegetative cells surrounding the egg is

Options

A. Funaria
B. Yeast
C. Riccia
D. Cycas

Answer

To answer the question about an example in which reproductive structures lack a layer of sterile vegetative cells surrounding the egg, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- First, we need to clarify what is meant by "sterile vegetative cells" and "reproductive structures". Sterile vegetative cells, also known as amoeboid cells, are non-reproductive cells that can provide support or protection to reproductive cells.

2. **Identifying the Context**:
- The question specifically asks for an example of a reproductive structure that does not have these sterile vegetative cells surrounding the egg. This indicates we are looking for a type of fungi where the reproductive structures are not protected by these cells.

3. **Recognizing the Example**:
- One of the well-known examples of fungi that fits this description is **Saccharomyces**. Saccharomyces is a genus of yeast that is widely used in baking and brewing.

4. **Characteristics of Saccharomyces**:
- Saccharomyces does not have a layer of sterile vegetative cells surrounding its reproductive structures (the egg). This is significant because it differentiates it from other fungi that do have such protective layers.

5. **Applications of Saccharomyces**:
- Saccharomyces is important in the production of fermented foods such as Idli, Dosa, and various alcoholic beverages. This highlights its role in both culinary and industrial applications.

6. **Conclusion**:
- Therefore, the answer to the question is that **Saccharomyces** is an example of a fungus where the reproductive structures lack a layer of sterile vegetative cells surrounding the egg.

### Final Answer:
The example in which reproductive structures lack a layer of sterile vegetative cells surrounding the egg is **Saccharomyces**.

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