Which of the following is a word which has two or more roots? Compound word
O Combining form
O Prefix
O Root word

Jacob plans to make reuben sandwiches for all his friends who are coming over to his house on a saturday evening. he is shopping for ingredients that would be required for the sandwiches. which type of bread should jacob ideally buy? a. white bread b. whole wheat bread c. sourdough bread d. ciabatta bread e. rye bread

[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.

Why mature red blood cells has no nucleus