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An Ecologist Studying Water Samples from a Lake Measures PH

Question 241

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An ecologist studying water samples from a lake measures pH, oxygen levels, temperature, turbidity (cloudiness) , and chemical concentrations of nitrogen, phosphorus, and potassium.The ecologist is studying the lake's


A) community.
B) abiotic factors.
C) populations.
D) energy flow.
E) biotic factors.

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