Final answer:
Ribosomes are found in all prokaryotic cells and are vital for protein synthesis.
Explanation:
Ribosomes are the structures found in all prokaryotic cells. They are responsible for protein synthesis.
Prokaryotic cells also contain flagella, fimbriae, and capsules, but ribosomes are the structure present in all prokaryotic cells.
Learn more about Prokaryotic cell structures here:
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