Which type of sexual reproduction is found in Spirogyra

Options

A. Conjugation
B. Binary fission
C. Fragmentation
D. Spores formation

Explanation

**Step-by-Step Solution:**

1. **Understanding Spirogyra**: Spirogyra is a filamentous green alga that is commonly found in freshwater environments. It is important to note that it can reproduce both asexually and sexually.

2. **Asexual Reproduction**: Asexual reproduction in Spirogyra occurs through a process called fragmentation. This means that the filament can break into smaller pieces, and each piece can grow into a new individual.

3. **Sexual Reproduction**: The question specifically asks about sexual reproduction. In Spirogyra, sexual reproduction occurs through a process known as conjugation.

4. **Conjugation Process**: During conjugation, two filaments of Spirogyra align side by side, and a conjugation tube forms between them. The contents of one filament (gamete) move into the other filament, leading to the fusion of gametes.

5. **Formation of Zygospore**: After the fusion of the gametes, a zygote is formed, which eventually develops into a zygospore. This zygospore can withstand harsh conditions and will germinate to form new filaments when conditions are favorable.

6. **Conclusion**: Therefore, the type of sexual reproduction found in Spirogyra is conjugation.

**Final Answer**: The type of sexual reproduction found in Spirogyra is conjugation.

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