Multiple Choice
What is generally true about essential elements and living organisms?
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Atoms- Smallest Unit of Matter
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What are the four most abundant elements found in living systems?
A
Hydrogen, oxygen, calcium, and nitrogen
B
Nitrogen, carbon, sulfur, and oxygen
C
Hydrogen, oxygen, nitrogen, and carbon dioxide
D
Hydrogen, oxygen, nitrogen, and carbon
Verified step by step guidance1
Identify the key elements that are essential for life and are most abundant in living organisms.
Understand that living organisms are primarily composed of elements that form organic molecules.
Recognize that carbon, hydrogen, oxygen, and nitrogen are the primary elements that make up proteins, nucleic acids, carbohydrates, and lipids.
Note that carbon is the backbone of organic molecules, while hydrogen and oxygen are critical for forming water and organic compounds.
Acknowledge that nitrogen is a major component of amino acids and nucleic acids, which are essential for life processes.
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