Gametophyte of dryopteris is

Options

A. monoecious
B. dioecious
C. trioecious
D. heterosporous

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about the gametophyte of Dryopteris, which is a type of pteridophyte, specifically a fern.

2. **Understand the Life Cycle**: In pteridophytes like Dryopteris, there are two main stages in their life cycle: the diploid sporophyte and the haploid gametophyte. These stages alternate with each other.

3. **Determine the Nature of the Gametophyte**: The gametophyte of Dryopteris is haploid, meaning it has one set of chromosomes.

4. **Identify the Type of Gametophyte**: The gametophyte of Dryopteris is described as monoecious. This means that it has both male and female reproductive organs on the same individual.

5. **Eliminate Incorrect Options**:
- **Dioecious**: This term means that male and female reproductive organs are on separate individuals, which is not the case for Dryopteris.
- **Triocious**: This term refers to having three different types of reproductive structures or individuals, which is also incorrect.
- **Heterosporous**: This term means producing different types of spores (male and female), which does not apply to the gametophyte of Dryopteris.

6. **Conclusion**: Since the gametophyte of Dryopteris is monoecious, it bears both male and female reproductive organs in the same individual. Therefore, the correct answer is that the gametophyte of Dryopteris is monoecious.

**Final Answer**: The gametophyte of Dryopteris is monoecious.

---