What would happen to a cell if the cell membrane were solid and waterproof?

What is the last and most crucial step in the treatment of alcoholism?

Amino acids are important to the body because they build carbohydrates proteins complex carbohydrates simple sugars fats

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?