In which of the following zygote forms a diploid structure :–

Options

A. Thallophyta
B. Bryophyta
C. Algae
D. Fungi

Answer

To determine in which of the following groups the zygote forms a diploid structure, we need to analyze the reproductive processes of each group: thalophyta, bryophyta, algae, and fungi.

### Step-by-Step Solution:

1. **Understanding Zygote Formation**:
- A zygote is formed when male and female gametes fuse during fertilization. This zygote is typically diploid (2n), meaning it contains two sets of chromosomes, one from each parent.

2. **Identifying the Groups**:
- **Thalophyta**: This group includes simple plants like algae. In many thalophytes, the zygote may not develop into a multicellular diploid structure.
- **Bryophyta**: This group includes mosses and liverworts. In bryophytes, the zygote develops into a multicellular diploid structure known as the sporophyte.
- **Algae**: Similar to thalophyta, many algae do not produce a multicellular diploid structure from the zygote.
- **Fungi**: In fungi, the zygote is typically formed from the fusion of two haploid cells and may not develop into a multicellular diploid structure.

3. **Analyzing Bryophyta**:
- In bryophytes, after fertilization, the zygote develops into a multicellular embryo, which is the sporophyte. This sporophyte is diploid and represents the diploid generation in the life cycle.

4. **Conclusion**:
- Based on the analysis, the zygote that forms a diploid structure is found in **bryophyta**. Therefore, the answer is **option 2: bryophyta**.