Levels of Organization

ATOMS Smallest part of matter NON-living

Molecules 2 or more bonded atoms Form compounds NON-living

Macromolecule Very large molecules Proteins, fats, carbohydrates, nucleic acids NON-living

Organelles “Tiny organs” Made of macromolecules

Cell Made of organelles Basic unit of structure & function LIVING

Tissue The same kind cell working together Living

Organs Tissues that work together Living

Systems Organs that work together Living

Organism Entire living things (organisms) Usually made of systems May be a single cell Living

Population Same type of organism living together

Community Several populations living together Population interact

Ecosystem A biotic (living) community plus the abiotic (nonliving) features

Biome Similar ecosystems on earth together

Biosphere Whole living layer around the globe Includes abiotic features http://people.hofstra.edu/geotrans/eng/ch8en/conc8en/envisys.html

Tissue Organ System Organism Atom Molecule Macromolecule Organelle Cell Tissue Organ System Organism Population Community Ecosystem Biome Biosphere