Biology, 16.10.2020 16:01 harleyandpope90
Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of
bacteria. The researchers grew one type of bacteria in twenty-four identical covered petri dishes. Then, they opened
eighteen petri dishes and applied the three hand sanitizers to six petri dishes each. They left the remaining six petri
dishes closed as a control group. When the researchers measured the growth of bacteria two days later, the six dishes
that had no hand sanitizer showed the least amount of bacterial growth. The researchers concluded that not using any
hand sanitizer would lead to the least bacterial growth.
Which statement best explains why the researchers' conclusion was not justified?
O The experiment tested too many variables.
O The control group was not treated the same as the experimental group.
O The sample size of twenty-four petri dishes is not large enough
O The sample size of twenty-four petri dishes is too large
Answers: 1
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Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous
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Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.
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Researchers conducted an experiment to identify the effects of three different hand sanitizers on th...
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