I believe it was the 15th century
Answer:
I beleive it is number one
The answer would be the Sodium potassium pump. This structure is the one that plays the main role in the controle of different types of ions under normal cellular function, as well as when cellular function is abnormal. It exchanges sodium and potassium ions from inside and outside a cell through the cellular membrane. With this, a steady amount of ions are found inside and outside.
Answer:
Social.
It is social, because these are people who were associated with the abolition movement, which was the movement to abolish slavery.
