Biology, 20.09.2020 09:01, ariellewallenst4348
Two students completed an experiment to determine if pesticide use at local farms was causing fish kills in a local pond. The steps of the experiment are listed below. Select different locations to collect water samples in the pond. Collect a 5-mL water sample at 8 am at a different location each day for 10 days. Measure the amount of pesticide present in each sample using the same measurement tools. After analyzing their data, the students conclude that pesticide runoff from farms is not causing the fish to die in the pond. Which of these statements best describes why their conclusion is not valid? The amount of water collected each day was the independent variable. The daily location for sample collection was not a controlled variable. Pesticide measurements were the dependent variable. The time of sample collection was not a controlled variable.
Answers: 3
Biology, 22.06.2019 05:20, kaziyahf2006
The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind
Answers: 2
Biology, 22.06.2019 07:00, ngoziblack
Dna replication or repair occurs in a cell in all of thw following situations except when
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Biology, 22.06.2019 13:00, deandrehudson18
What problem would a person most likely have if her kidney did not work correctly?
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Two students completed an experiment to determine if pesticide use at local farms was causing fish k...
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