Consuming inadequate calories or having a deficiency in certain vitamins or minerals is known as
a. type i diabetes.
b. undernutrition.
c. overnutrition.
d. glaucoma

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?