In which group of algae, 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 solve the question of which group of algae has sexual reproduction that does not show considerable variation in the type and formation of sex cells and is always of an advanced type, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about a specific group of algae where sexual reproduction is consistent and advanced, without much variation in the type and formation of sex cells.

2. **Identify the Groups of Algae**: The options provided are:
- Red algae
- Brown algae
- Green algae
- Golden algae

3. **Analyze Each Group**:
- **Green Algae**: Known for high variability in sexual reproduction. They can be isogamous (similar gametes), oogamous (different gametes), or anisogamous (dissimilar gametes). This group does not fit the criteria of having little variation.

- **Brown Algae**: Also shows variability in sexual reproduction, with some species being isogamous, oogamous, or anisogamous. Thus, this group does not meet the requirement either.

- **Golden Algae**: Commonly referred to as chrysophytes, they belong to the protist kingdom and are not classified as true algae. Their reproductive methods are not consistent with the advanced type mentioned in the question.

- **Red Algae**: Primarily reproduce through oogamous reproduction, where the female gamete is non-motile and larger, while the male gamete is motile and smaller. This type of reproduction is consistent and advanced, showing little variation.

4. **Conclusion**: Based on the analysis, the group of algae that fits the description of having sexual reproduction that does not show considerable variation and is always advanced is **Red Algae**.

### Final Answer:
The correct answer is **Red Algae**.