Portfolios may be digital or "hard copies" of items kept in a folder. true false

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

Is the process by which biological parents pass traits such as hair type or eye color to their children. these traits may affect their well-being and health.

The social science that differs from sociology primarily in that it focuses on individual behavior rather than on group behavior is a. anthropology. c. psychology. b. economics. d. political science.