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Biology
Scientific study of life
Living Things
- There is a great diversity
- Composed of the SAME chemical elements as non living things
- Obey the same physical and chemicals laws that govern everything in the universe
Characteristics of Life
Atom - Molecule - Cell - Tissue - Organ - Organ Systems - Organisms - Population - Community - Ecosystem - Biosphere
Levels of Biological Organization
Biosphere
- Zone of air, land (crust), and water where organisms exist
- Regions of the Earth's crust, waters and atmosphere inhabited by living things
Ecosystem
Community plus its physical environment
- Characterized by chemical cycling and energy flow
Community
Collection of interacting populations within the same environment or particular area
Population
All the members/organisms of a species within a particular area
Organism
An individual; complex individuals contain organ systems
Organ Systems
Composed of several organs working together for a particular function
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