A researcher has one group of children go trick-or-treating wearing masks and a second group of children go trick-or-treating without masks. The researcher finds that the children who wore masks took more candy than the children who did not wearmasks. What was the control group in this study?
a. The group who wore masks
b. The group who did not wear masks
c. The act of trick-or-treating
d. The amount of candy taken
Question 2
Dr. Kurtz believes that students who use calculators learn the basics of math better. He designs an experiment in which Group A is taught a math concept and allowed to use calculators. Group B is taught the same math concept but is not allowed to use calculators. Then he gives both groups a standardized math test to assess their knowledge of the concept and compares their scores. In Dr. Kurtz's experiment, the standardized math test score is the ____.
a. dependent variable
b. independent variable
c. confound
d. placebo
The heme group viewed from the side. This view shows the two coordination bonds to Fe2+
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