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Ecology
ecology | study of all the interactions among organisms and their environment |
abiotic factor | any nonliving part of the environment,such as water,sunlight |
biotic factor | any living or once living organism in the environment |
population | all of the individuals of one species that live in the same space at the same time |
ecosystem | all of the communities in a given area and the abiotic factors that affect them |
biosphere | part of earth that supports life |
population density | number of individuals in a population that occupies an area of limited size |
habitat | place where an organism lives |
symbiosis | any close interaction among two or more different species |