TheSillyMichael1566
09.09.2020 •
Biology
A botanist decides that he wants to test the effects of ultraviolet light on the growth of plants. Which of the following does NOT need to be kept constant for each of the plants used in this experiment? A. Soil pH B. Air Temperature C. Air Humidity D. Plant growth
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Ответ:
Tobacco Smoke
and
Combustion from Industry.~ Almost all of the common air pollutants can be produced by industrial processes.
hope i helped :]