Dichotomous Key, diagram used in classification; each ‘arm’ of the key contains two options (11, 3)diagram used in classification; each ‘arm’ of the key contains two options, Producer, an organism that can make its own food / energy (8)an organism that can make its own food / energy, Consumer, organisms that must eat other organisms to get the energy and nutrients they need (8)organisms that must eat other organisms to get the energy and nutrients they need, First Order Consumer, a consumer that eats a producera consumer that eats a producer, Decomposer, organisms that get the energy they need by breaking down dead matter and wastes (10)organisms that get the energy they need by breaking down dead matter and wastes, Food Chain, as the flow of energy from organism to organism in a series of feeding relationships (4, 5)as the flow of energy from organism to organism in a series of feeding relationships, Predator, an animal that eats other animals, Prey, an animal that is eaten by a predatoran animal that is eaten by a predator, Ecosystem, a system where organisms interact with each other and their non-living surroundings (9)a system where organisms interact with each other and their non-living surroundings, Food Web, many food chains interlinked to form an ecosystemmany food chains interlinked to form an ecosystem, Competition, two individuals competing for the same resourcetwo individuals competing for the same resource, Biodiversity, the variety of life; difference plants, animals and microorganisms and the ecosystem they live in (12)the variety of life; difference plants, animals and microorganisms and the ecosystem they live in.

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