Over time, scientists provided plenty of evidence to support their hypotheses about the cell theory. What instrument enabled them to provide this evidence? A stethoscope
B microscope
C thermometer
D telescope

microscope

Explanation:

Microscope is an instrument used to see micro organisms that cannot be seen with the naked eye ie cells.

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.