To break down sugar and supply the cell with energy would be the mitochondria,and this process is called cellular respiration.
The Aztec civilizations developed a system
The correct answer is the placebo effect causes brain changes.
Explanation: Placebo effect is the measurable or observable effect on a person or group who has been given a placebo treatment. Many believe that the placebo effect is psychological, due to a real effect caused by belief or subjective illusion.
There was a “need” for slaves due to the diminishing numbers of Native Americans in the New World caused by the diseases the Europeans brought over. Slaves from Africa had already been exposed to such diseases like smallpox and were immune to them making them more beneficial to European settlers.
