When explaining the probability of assignment to trial arms in consent forms, which is true? a. fda requires the probability to be expressed as a percentage chance. b. the use of a placebo arm does have to be specifically stated, but not the chance of assignment. c. ich notes that it should be included, but does not specify how the information should be presented. d. the probability of assignment should always be stated as being "like the flip of a coin" because subjects can understand that example

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

Select all that apply genes are specific nucleotide sequences occur in numbers that are the same as the number of chromosomes are located in a specific place on a chromosome determine the traits of an organism are units of rna