In which group of algea, the sexual reproduction does not show considerable variation in the type and formation of sex cells and is always advanced type in

Options

A. Red algae
B. Brown algae
C. Green algae
D. Golden algae

Answer

To answer the question regarding which group of algae shows minimal variation in sexual reproduction, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Groups of Algae**: The main groups of algae mentioned are:
- Green Algae (Chlorophyceae)
- Brown Algae (Phaeophyceae)
- Red Algae (Rhodophyceae)
- Golden Algae (Chrysophyceae)

2. **Examine Sexual Reproduction in Each Group**:
- **Green Algae (Chlorophyceae)**: Sexual reproduction can be isogamous (gametes of similar size), anisogamous (gametes of different sizes), or oogamous (one motile and one non-motile gamete). This indicates considerable variation.
- **Brown Algae (Phaeophyceae)**: Similar to green algae, brown algae can also exhibit isogamous, anisogamous, and oogamous reproduction, showing variation.
- **Red Algae (Rhodophyceae)**: In red algae, sexual reproduction is primarily oogamous, meaning it involves a large non-motile female gamete and a smaller motile male gamete. This type is consistent and does not show much variation.
- **Golden Algae (Chrysophyceae)**: This group is less commonly recognized and does not have a well-defined sexual reproduction pattern.

3. **Conclusion**: Based on the analysis, red algae (Rhodophyceae) exhibit sexual reproduction that does not show considerable variation in the type and formation of sex cells. It is consistently advanced and primarily oogamous.

4. **Final Answer**: The group of algae in which sexual reproduction does not show considerable variation and is always of an advanced type is **Red Algae (Rhodophyceae)**.