In Ulothrix meiosis (Reduction division) occurs in

Options

A. Gamete
B. Zygospore
C. Zoospore
D. Thallus

Explanation

To answer the question regarding where meiosis (reduction division) occurs in Ulothrix, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ulothrix**: Ulothrix is a green alga that reproduces both sexually and asexually. It is important to know the life cycle of Ulothrix to identify where meiosis occurs.

2. **Identifying the Process of Meiosis**: Meiosis is a type of cell division that reduces the chromosome number by half, resulting in the formation of gametes. In Ulothrix, meiosis leads to the formation of haploid cells.

3. **Recognizing the Structures Involved**: In Ulothrix, the key structures involved in reproduction include gametes, zygospores, and zoospores.

4. **Fertilization and Zygospore Formation**: The gametes (which are haploid) fuse during fertilization to form a diploid zygospore. This zygospore is a resting stage that undergoes meiosis.

5. **Meiosis in the Zygospore**: After a resting period, the zygospore undergoes meiosis, resulting in the formation of haploid zoospores and applanospores. Thus, the reduction division occurs in the zygospore.

6. **Conclusion**: Therefore, in Ulothrix, meiosis occurs in the zygospore.

### Final Answer:
In Ulothrix, meiosis (reduction division) occurs in the zygospore.

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