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, 21.06.2019 22:30
Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials
Answers: 2
Biology, 22.06.2019 07:00
Give an example of a trait that is controlled by more than one gene.
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Biology, 22.06.2019 11:30
Plz quick a natural resource that is replaceable through a cycle in nature or sustainable practice is called a? the subject is science
Answers: 1
Biology, 22.06.2019 12:30
Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.
Answers: 1
Two students completed an experiment to determine if pesticide use at local farms was causing fish k...
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