Home Biology Ecosystem Statement Based Questions Which two of the, following changes (A-D) us…
Biology Ecosystem Statement Based Questions Single Correct MCQ
Published on: August 13, 2026

Which two of the, following changes (A-D) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)?

A
Increase in red blood cell size. and and
B
Increase in red blood cell production and
C
Increased breathing rate and
D
Increase in thrombocyte count Changes occurring are :

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The correct answer is:
B

At high altitudes, oxygen levels are low, so the body adapts by increasing red blood cell production and increasing breathing rate. These changes help supply more oxygen to tissues.

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