Thalloid plant body occurs in

Options

A. Gymnosperms
B. Algae
C. Bryophyta
D. Pteridophyta.

Answer

To solve the question "Thalloid plant body occurs in," we will analyze each option provided and determine which one is correct based on the characteristics of the plant groups mentioned.

### Step-by-Step Solution:

1. **Understand the term "Thalloid":**
- A thalloid plant body refers to a plant structure that is not differentiated into true roots, stems, or leaves. Instead, it has a simple, flat, and often lobed structure.

2. **Evaluate the options:**
- **Option 1: Gymnosperms**
- Gymnosperms are vascular plants with well-developed structures including roots, stems, and leaves. They do not have a thalloid body.
- **Conclusion:** This option is incorrect.

- **Option 2: Algae**
- Algae are simple, non-flowering plants that often have a thalloid structure. They can be unicellular or multicellular and do not have true roots, stems, or leaves.
- **Conclusion:** This option is correct.

- **Option 3: Bryophyta (Mosses)**
- Bryophytes, including mosses, have a more complex structure than algae but still do not have true roots, stems, or leaves. However, they are not typically classified as having a thalloid body; they have a gametophyte stage that can appear leafy.
- **Conclusion:** This option is incorrect.

- **Option 4: Pteridophyta (Ferns)**
- Pteridophytes are vascular plants that include ferns. They have true roots, stems, and leaves, and are not classified as having a thalloid body.
- **Conclusion:** This option is incorrect.

3. **Final Answer:**
- Based on the analysis, the correct answer is **Option 2: Algae**, as they are the group of plants that exhibit a thalloid body structure.