In pteridophytes, the male and female sex organs are produced on `:`

Options

A. gametophytes
B. sporophytes
C. sporangia
D. sporophylls

Answer

**Step-by-Step Solution:**

1. **Understanding Pteridophytes**: Pteridophytes are the first terrestrial plants that developed vascular tissues, which include xylem and phloem. They encompass a variety of plants, including ferns and horsetails.

2. **Sporangia and Sporophylls**: In pteridophytes, reproductive structures called sporangia are formed on specialized leaves known as sporophylls. Sporophylls are leaf-like structures that bear sporangia.

3. **Sporogenesis**: Inside the sporangia, there is a tissue called porogenous tissue, where spore mother cells undergo meiosis to produce spores. These spores are crucial for the reproductive cycle of pteridophytes.

4. **Formation of Gametophytes**: The spores released from the sporangia germinate and develop into multicellular, free-living structures called gametophytes. In pteridophytes, the gametophyte is specifically known as the Prothallus.

5. **Types of Spores**: There are two types of spores produced: megaspores and microspores. Megaspores develop into female gametophytes, while microspores develop into male gametophytes.

6. **Sex Organs on Gametophytes**: The male and female gametophytes bear the respective sex organs. The female gametophyte produces female sex organs called archegonia, and the male gametophyte produces male sex organs called antheridia.

7. **Conclusion**: Therefore, in pteridophytes, the male and female sex organs are produced on gametophytes.

**Final Answer**: The male and female sex organs are produced on **gametophytes**.

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