An ecologist wants to study the effects of pollution on plant growth. The scientist uses two groups of plants. To the first group, a type of pollutant is added. To the second group, nothing is added....

An ecologist

wants to study the effects of pollution on plant growth. The scientist uses two

groups of plants. To the first group, a type of pollutant is added. To the

second group, nothing is added. The scientist records plant growth for each

plant for two weeks. What is the purpose of the second group in the scientist’s

study?

Sep 05, 2022

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An ecologist wants to study the effects of pollution on plant growth. The scientist uses two groups of plants. To the first group, a type of pollutant is added. To the second group, nothing is added....

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