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Levels of Organization
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ATOMS Smallest part of matter NON-living
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Molecules 2 or more bonded atoms Form compounds NON-living
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Macromolecule Very large molecules
Proteins, fats, carbohydrates, nucleic acids NON-living
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Organelles “Tiny organs” Made of macromolecules
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Cell Made of organelles Basic unit of structure & function LIVING
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Tissue The same kind cell working together Living
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Organs Tissues that work together Living
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Systems Organs that work together Living
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Organism Entire living things (organisms) Usually made of systems
May be a single cell Living
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Population Same type of organism living together
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Community Several populations living together Population interact
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Ecosystem A biotic (living) community plus the abiotic (nonliving) features
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Biome Similar ecosystems on earth together
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Biosphere Whole living layer around the globe
Includes abiotic features
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