Ecology: the study of relationships between living things and between living things and their environments.
Biotic: the living factors of an environment
Abiotic: the non-living factors of an enviornment
Organism: a single living individual
Population: the number of organisms of the same species lliving in an ecosystem
Community: all the populations iwthin an ecosystem
Ecosystem: a system of living things that interact with each other and with the physical world
Biome: a colleciton of related ecosystems
Biosphere: all biomes, all ecosystems on Earth
THE ORGANIZATION OF LIFE
cell
tissue
organ
organism
population
community
ecosystem
biome
biosphere