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lesson pretestMultiple Choice

Pretest

Question 1 • CMS 2026-2027 Biology CREDIT RECOVERY

Which statement best illustrates why carbon is so important to life on Earth?

Answer
A
Carbon is found in both the living and nonliving worlds.
B
Carbon is stored in large quantities in fossil fuels.
C
Carbon-based macromolecules are found in living things.
D
Carbon occurs as a solid, a liquid, and a gas.

Explanation

Carbon is important to life because it forms the backbone of many large molecules, including carbohydrates, proteins, lipids, and nucleic acids. These carbon-based macromolecules build cells and carry out essential life processes. The other statements describe carbon’s distribution, storage, or forms, but do not explain its central role in living things.

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