biotic - living things in an ecosystem, abiotic - non living things in an ecosystem, ecosystem - all the living and non living things that interact in an area, Species - a single type of organism that can reproduce, population - a group of organisms from the same species living in the same area, community - various populations of living things in the same area, basic needs - the things that living organisms need to survive, nutrients - vitamins and minerals that an organism needs to survive, symbiosis - the different relationships or interactions between living things in an ecosystem, commensalism - a relationship between living things where one benefits and nothing happens to the other, mutualism - a relationship between living things where both benefit, parasitism - a relationship between living things where one benefits and the other is harmed, physical adaptation - when an organism changes it physical appearance to help it survive, behavioral adaptation - when an animal changes the way it acts or the things it does in order to increase its chance of survival,

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