Biology, 21.10.2019 18:00 larueeee25
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?
the experiment tested too many variables.
the control group was not treated the same as the experimental group.
the sample size of twenty-four petri dishes is not large enough.
the single type of bacteria is not adequate to make any conclusions.
Answers: 1
Biology, 22.06.2019 01:00
Drag each label to the correct location on the table. each label can be used more than once. decide whether each statement describes saturated fat, unsaturated fat, or both saturated and unsaturated fats.
Answers: 3
Biology, 22.06.2019 09:00
In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.
Answers: 1
Researchers conducted an experiment to identify the effects of three different hand sanitizers on th...
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