Plants which are not differentiated into roots, stems and leaves are

Options

A. Algae
B. Gymnosperms
C. Pteridophytes
D. Angiosperms

Answer

To solve the question "Plants which are not differentiated into roots, stems, and leaves are:", we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for plants that do not have a clear differentiation into roots, stems, and leaves. This means we are looking for a type of plant that has a simpler structure.

2. **Analyzing Option A - Algae**:
- Algae are simple, plant-like organisms that typically do not have true roots, stems, or leaves. They are often aquatic and can perform photosynthesis.
- Since they lack the differentiation into these structures, this option seems correct.

3. **Analyzing Option B - Gymnosperms**:
- Gymnosperms are seed-producing plants that have exposed seeds (naked seeds). They are characterized by having a vascular system and are differentiated into roots, stems, and leaves.
- Therefore, this option is incorrect.

4. **Analyzing Option C - Pteridophytes**:
- Pteridophytes, such as ferns, are vascular plants that reproduce via spores. They have a well-defined structure with roots, stems, and leaves.
- This option is also incorrect.

5. **Analyzing Option D - Angiosperms**:
- Angiosperms are flowering plants that produce seeds enclosed within fruits. They also have a clear differentiation into roots, stems, and leaves.
- Hence, this option is incorrect as well.

6. **Conclusion**: After analyzing all the options, the only type of plant that is not differentiated into roots, stems, and leaves is **Option A - Algae**.

### Final Answer:
The correct answer is **Option A - Algae**.

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