People living in high altitudes (like mountains) usually have a _________?

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People living in high altitudes (like mountains) usually have a _________? Answer: larger number of Red Blood Cells

People living in high altitudes usually have a larger number of Red Blood Cells to compensate for lower oxygen levels in the air. This increased count of red blood cells, known as polycythemia, is a physiological adaptation that enhances the blood's oxygen-carrying capacity, allowing the body to function more effectively in a hypoxic (low oxygen) environment.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.