Thylakoids are found in

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 and other pigments that capture light energy.

2. **Identifying Where Thylakoids are Found**: Since thylakoids are part of chloroplasts, we need to identify which organisms contain chloroplasts. Chloroplasts are primarily found in plants and some algae.

3. **Examining the Options**:
- **Option 1: Bacteria**: Bacteria do not have chloroplasts because they are prokaryotic organisms, which lack membrane-bound organelles. Therefore, thylakoids are absent in bacteria.
- **Option 2: Blue Green Algae**: Blue green algae, also known as cyanobacteria, are actually bacteria and do not have chloroplasts. Thus, thylakoids are also absent in blue green algae.
- **Option 3: Higher Plants**: Higher plants contain chloroplasts, and therefore, they also contain thylakoids. This option is correct.

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

**Final Answer**: Thylakoids are found in higher plants.

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