Thylakoid are found in the plastids of

Options

A. bacteria
B. blue green algae
C. higher plants
D. all of these

Answer

**Step-by-Step Solution:**

1. **Understanding Thylakoids**: Thylakoids are membrane-bound structures found within chloroplasts. They are essential for the process of photosynthesis as they contain chlorophyll, which captures light energy.

2. **Identifying the Location**: Thylakoids are specifically found in chloroplasts, which are a type of plastid. Plastids are organelles found in plant cells and some protists.

3. **Examining the Options**:
- **Option 1: Bacteria**: Bacteria are prokaryotic organisms and do not have membrane-bound organelles, including chloroplasts and thylakoids. Therefore, this option is incorrect.
- **Option 2: Blue-green algae (Cyanobacteria)**: Although they perform photosynthesis, blue-green algae are classified as prokaryotes (specifically cyanobacteria) and do not have true chloroplasts or thylakoids. Thus, this option is also incorrect.
- **Option 3: Higher plants**: Higher plants contain chloroplasts, which have thylakoids. This option is correct.

4. **Conclusion**: Based on the analysis, thylakoids are found in the plastids of higher plants.

**Final Answer**: Thylakoids are found in the plastids of higher plants.

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