Levels of Organization

Biosphere• Whole living layer around the globe

• Includes abiotic features

http://people.hofstra.edu/geotrans/eng/ch8en/conc8en/envisys.html

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

Community• Several populations living together

• Populations interacting with each other

Population• Same type of organisms living together

Organism• Entire living things (organisms)

• Usually made of systems

• May be a single cell

• Living

Systems• Organs that work together

• Living

Organs• Tissues that work together

• Living

Tissue• The same kind of cells working together

• Living

Cell• Made of organelles

• Basic unit of structure & function

• Living

Molecules • 2 or more bonded atoms

• Form compounds

• Non-living

ATOMS• Smallest part of matter

• Non-living