Levels of Organization

Atom Molecules Organelles Cells Tissues Organs Organ System Organism Population Community Ecosystem Biome Biosphere

ATOMS Smallest part of matter Non-living

Atoms Molecule Molecules 2 or more bonded atoms form compounds Non-living Atoms Molecule

Organelles Tiny organs that operate functions in a cell

Cell Made up of organelles Basic unit of structure & function LIVING

Tissue The same kind cell working together Living

Organs Tissues that work together Living

Organ Systems Organs that work together Living Nervous System Brain, Spinal Cord, etc. Nervous System

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