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Biosphere
Zone of life on Earth, 20km in height
Abiotic
Nonliving things in ecosystem, e.g., soil, light
Biotic
Living things in ecosystem, e.g., photosynthesis
Population
Individuals of one species in an area
Community
Individuals of all species in an area
Ecosystem
Community and physical environment, abiotic and biotic factors
Biome
Ecosystem with a specific climate
Habitat
Where one organism lives
Niche
Role an organism has in an ecosystem
Symbiosis
Close interaction between two organisms
Mutualism
Interaction benefiting both organisms
Commensalism
Interaction benefiting one organism without affecting the other
Parasitism
Interaction benefiting one organism while harming the other
Rule of 10
Only 10% energy passed down trophic levels
Autotrophs
Primary producers, usually through photosynthesis
Heterotrophs
Organisms getting energy from consuming others
Carnivores
Organisms eating animals
Herbivores
Organisms eating plants
Decomposers
Organisms breaking down organic material
Nitrogen Fixation
Process of taking nitrogen from the atmosphere by bacteria
Eutrophication
Excess nitrogen and phosphorus causing overgrowth
Pioneer Species
First species to colonize barren environments
Carrying Capacity
Limit to habitats and niches an environment can support
Note 
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