Pear shaped gametes with two laterally attached flagella are formed in

Options

A. Polysiphonia
B. Ulothrix
C. Fucus
D. Spirogyra

Answer

To solve the question regarding the formation of pear-shaped gametes with two laterally attached flagella, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Gametes**:
- Gametes are reproductive cells that can be motile or non-motile. They can be classified based on their shape and motility.

2. **Identifying Gamete Types**:
- The question mentions "pear-shaped gametes" with "two laterally attached flagella." This description suggests a specific type of gamete known as anisogamous gametes, which are characterized by having two different types of gametes: one motile and one non-motile.

3. **Analyzing the Options**:
- The options provided in the question likely include various types of algae or plants. We need to evaluate each option to see which one produces the described gametes.

- **Polysiphonia**: This organism produces non-motile gametes, so it does not fit the description.

- **Ullothrix**: This organism produces flagellated gametes, but they are typically circular, not pear-shaped.

- **Spirogyra**: This organism produces isogamous gametes, which are similar in shape and size, thus not fitting the description of pear-shaped anisogamous gametes.

- **Fucus**: This organism is known to produce pear-shaped gametes with two laterally attached flagella, fitting the description perfectly.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Fucus**, which is the only option that matches the characteristics of pear-shaped gametes with two laterally attached flagella.

### Final Answer:
- The correct answer is **Fucus**.