How many ureters does the urinary system contain?

True or false a fertilized cell divides many times to form an embryo

Investigator a has biological specimens that are coded and linked to identifiers of the source individuals. investigator a provides the specimens to investigator b but does not provide the individual identifiers. investigator b agrees not to re-identify the source individuals. is investigator b's research using the biospecimens human subjects research according to the definition of human subjects research in the federal regulations?

An individual will only feel stress in negative situations. select the best answer from the choices provided. t f