Certain nutrients are considered essential in the diets of some animals because .

[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.

Exercise equipment compensates for acting irresponsibly are disregarding the rules of physical activity

The french parenting style is somewhat different. they believe in maintaining , which means a framework or boundary. parents draw firm boundaries for children, and they expect children to abide by their rules and regulations. at the same time, they offer some degree of to their children.