Dr. sullivan is conducting a clinical trial to determine if vitamin xx can improve test performance of students in an introductory college nutrition course. dr. sullivan puts all the students' names in a hat and draws names to determine if they will be placed in the control or the experimental group. the experimental group receives a capsule of vitamin xx and the control group a "sugar pill" that tastes and looks identical to the vitamin xx capsule. neither dr. sullivan nor the participants know who is receiving which treatment. this experiment is best described as

Which of the following describes an effect of globalization? a. car parts are manufactured in asia. b. an american company has factories in mexico. c. diamonds and other gems are sold in africa. d. china has placed restrictions on burning coal. drag the descriptions of developing and developed countries to the appropriate boxes. high income low income economy based on manufacturing economy based on services and finance widespread access to healthcare high poverty rates developing(box) developed (box) what is one development in medicine that has occurred because of new surgical techniques? a. more people die during long surgical procedures. b. transplants of organs have become more common. c. fewer people are opting for major surgeries. d. too many people are attending school to become surgeons. what most likely caused the condition shown in this photograph? a. overpopulation b. deforestation c. high carbon dioxide levels d. competition for water which of the following has occurred because of increased competition for resources? a. increased dependence on fossil fuels b. overproduction of coal c. water shortages d. overdependence on solar power what invention led to the development of smaller computers after the 1960s? a. the electronic circuit board b. the internet c. email d. the calculator