Important Questions for Class 11 Biology for Chapter 14

Important Questions Class 11 Biology Chapter 14 Respiration Plants Part 1 Important Questions Class 11 Biology Chapter 14 Respiration Plants Part 2 Important Questions Class 11 Biology Chapter 14 Respiration Plants Part 3 Important Questions Class 11 Biology Chapter 14 Respiration Plants Part 4 Important Questions Class 11 Biology Chapter 14 Respiration Plants Part 5

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Which two of the following changes (I-IV) usually tend to occur in the plain dwellers, when they move to high altitudes (3500 m or more)?
I.  Increase in red blood cell size.
II. Increase in red blood cell production.
III. Increased breathing rate.
IV.  Increase in thrombocyte count.
Changes occurring are