Which gas in Earth’s atmosphere helps living things make proteins? A. Oxygen
B. Nitrogen
C. Water vapor
D. Carbon dioxide
Which gas in Earth’s atmosphere helps living things make proteins?
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The correct answer is B. Nitrogen.
Nitrogen makes up about 78% of Earth’s atmosphere and is essential for the growth of living organisms, as it is a key component of amino acids, which are the building blocks of proteins. While oxygen is crucial for respiration and carbon dioxide is important for photosynthesis, nitrogen is specifically involved in protein synthesis.