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Katherine wanted to determine which of several popular herbicides was most effective on weeds. she grew five flats of 100 grass seeds each for 5 days. she then took each of five herbicides and sprayed the same amount on each flat. each flat received the same amount of water and sunlight. she observed the flats and the end of 12, 24, 36 and 48 hours and counted how many plants in each flat died within the various time periods. what is the independent dependent variables and the control? ?
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Katherine wanted to determine which of several popular herbicides was most effective on weeds. she g...
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