LEVELS OF BIOLOGICAL ORGANIZATION

Pack of wolves, school of fishes and pride of lions.

• CELL

• POPULATION

• ORGAN

• COMMUNITY

Collection of all ecosystems.

• COMMUNITY

• POPULATION

• BIOSPHERE

• ORGANISM

Organisms living under the ocean.

• ECOSYSTEM

• POPULATION

• COMMUNITY

• BIOSPHERE

Consists of all living things in an area with non-living parts of the environment.

• COMMUNITY

• ECOSYSTEM

• POPULATION

• BIOSPHERE

Examples: human, dog, cat, and bird.

• ORGANISM

• ORGAN

• TISSUE

• CELL

Collection of tissues grouped together performing a common function.

• ORGAN

• TISSUE

• CELL

• ORGAN SYSTEM

Smallest unit of all living organisms.

• CELL

• TISSUE

• ORGAN

• ORGAN SYSTEM

Consists of functionally related organs.

• CELL

• ORGAN

• ORGAN SYSTEM

• TISSUE

Muscle tissue, skin tissue, and skeletal tissue.

• CELL

• TISSUE

• ORGAN

• ORGAN SYSTEM

Parts of the cell.

• ORGANELLE

• CELL

• ORGAN

• TISSUE