Answer:
C. It portrays evolutionary change as a smooth curve.
Freedom in American history and
Since the other answer got deleted, i'll just answer it for you.
a sinoatrial node is the main pacemaker that begins each heartbeat located in the junctions of superior vena cava and the right atrium. It signals from the node that spread through the atria and determines the heart rates.
Answer:
Common examples of social issues: Poverty and Homelessness, Climate Change, Civil Rights and Racial Discrimination, etc.
Explanation:
There's so much more examples of social issues down the list, but that'll take to long, these are enough for now.