biosphere , part of the surface occupied by living organisms., species , a group of living organisms, population , a group of organisms living in a certain area, community , a group of people living in the same place, ecology, how different organisms interact with each other , ecosystem , where all of the different organisms live, biome , a large place with flora and fauna , biotic factor , a living organism , abiotic factor , a non-living organism , autotroph , an organism that is able to form nutritional organic substances from simple inorganic substances, primary producer , an organism that makes its own food , photosynthesis , organisms use sunlight to synthesize foods from carbon dioxide and water, heterotroph , an organism uses its nutritional requirements from complex organic substances, consumer , an organism that eats another organism , carnivore , an animal that eats only meat , herbivore , an animal that eats only plants, scavenger , an animal that eats dead plants, omnivore , an animal that eats both plants and meat, decomposer , a bacteria or fungi that decompose organic material , food chain , organisms that rely on each other for food, food web , a system of interlocking food chains, biomass, the total amount of organisms living in an area, limiting factor , the total amount of organisms allowed in one area , habitat, where an organism lives, niche , a job in the ecosystem , competitive execution principal, when two organisms compete, predation , one organism preying on another, keystone species , a species in an ecosystem that the other species depend on, symbiosis , interaction between two different organisms living in close physical association, mutualism , the symbiosis that is beneficial to both organisms involved.

ECOLOGY!!!

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