Which one of the following organelles is ONLY present in Cyanobacteria?
Correct answer: A. Heterocyst
- A. Heterocyst
- B. Lysosomes
- C. Mitochondria
- D. Ribosomes
Explanation
Heterocysts are specialized cells found in certain filamentous cyanobacteria (blue-green algae) that play a critical role in nitrogen fixation.
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