Which type of research study is set up so that neither subjects nor investigators know which is the active group and which is receiving a placebo? question 10 options: case control double blind clinical trial epidemiological

Which action is the cerebrum responsible for? a. breathing b. coordination c. problem solving d. balance and one more question which characteristic true of both boys and girls during puberty? a. a curvier shape b. a deeper voice c. weight loss d. body hair