Why did more people die from diseases in the 1800s?

A. Vaccines weren’t strong enough.
B. Pathogens were more resistant to medicine.
C. No one knew that germs existed.
D. People did not care as much about health.

PL HURRYYY

The environments condition has an affect on the inhabitants true or false

Marcus's genotype for eye color is bb. olivia has brown eyes, but she is heterozygous for the trait. what percentage of the children have blue eyes? if violet has green eyes and jonas has brown eyes, what is claudia's genotype? how many people in the family have blue eyes?

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?