Indicator species - A species by their presence or absence indicate environmental quality , Niche - The role an organism plays in a community, Abiotic - A non-living factor which can affect distribution of an organism, Biotic - A living factor which can affect distribution of an organism, Biodiversity - The number of different species in an ecosystem, High oxygen levels - Will be present with low water pollution and a low bacteria levels, Low oxygen levels - Will be present with high water pollution and high bacteria levels, Decomposer - A bacteria or fungi that feeds on decaying matter,

N5 KA 1 matching pairs

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