Given a scientific question, generate a correct answer to it.
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Question: Skeletal muscle cells and cardiac muscle cells share what property, which is not shared by smooth muscle cells?

Answer: striations

Question: Amino acids are joined together to form a chain at what molecular structure?

Answer: ribosomes

Question: Which type of glaciers form several unique features through erosion, including cirques, aretes, and horns?

Answer:
valley glaciers