Answer:
higher altitudes have a lower level of oxygen which in turn, trains your lungs to hold and breathe more oxygen which also helps you cycle, run, etc. longer than usual
Explanation:
I am pretty sure that the answer is B.
I believe it's false. The nucleus is the control center of the cell. The mitochondria is commonly known as the cell's powerhouse.
C. The question is hinting at the similarities between how single cellular organisms maintain homeostasis by regulating water levels the same way the kidney does for multi cellular humans.
