Biology, 20.08.2019 22:30, leslymejiaquiroz1
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.
1.select different locations to collect water samples in the pond.
2.collect a 5-ml water sample at 8 am at a different location each day for 10 days.
3.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?
a. the amount of water collected each day was the independent variable.
b. the daily location for sample collection was not a controlled variable.
c. pesticide measurements were the dependent variable.
d. the time of sample collection was not a controlled variable.
Answers: 3
Biology, 21.06.2019 16:10, eliLoumbardia
Maria wanted to grow a fern in her backyard. acting on a suggestion from a friend, she collected brown dots from the underside of a fern's leaves and then potted them. after a few days, maria saw small fern leaves erupting from the pot. which statement explains this phenomenon? a. the fern transitioned from gametophyte generation to sporophyte generation. b. the fern grew as a result of mitosis. c. the fern transitioned from sporophyte generation to gametophyte generation. d. the fern grew to be genetically identical to its parent plant.
Answers: 1
Two students completed an experiment to determine if pesticide use at local farms was causing fish k...
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