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CAMPBELL BIOLOGY UNIT 1 EXAM Q’S AND A’S
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8

November 2025

2025/2026

A+
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CAMPBELL BIOLOGY UNIT 1 EXAM Q’S AND A’S Organisms are composed of... - ANSWER-Matter Matter is made up of... - ANSWER-Elements How many elements occur in nature? - ANSWER-82 Compound - ANSWER-A substance consisting of 2 or more different elements combined in a fixed ratio. % of natural elements that are essential elements - ANSWER-20-25% 4 Major elements of living matter - ANSWER-Carbon Nitrogen Oxygen and Hydrogen Atom - ANSWER-Smallest unit of matter this still retai...
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