Question

People living at high altitudes have

• A. More better digestive system
• B. Have better phagocytosis processes
• C. Have increased immunity
• D. Have more haemoglobin in blood

Answer 1

The correct option is D Have more haemoglobin in blood

When the altitude increases, there is an increase in the pressure which reduces the level of oxygen. The people living at lower altitudes have a problem in breathing because of the low level of oxygen at higher altitudes . So, the people living at higher altitudes have increased the amount of red blood cells and hemoglobin in their blood. This increased level of hemoglobin helps to take up more amount of oxygen.

Thus, the correct answer is option D.