Respiration is the physiological process in which

If a man from the sea coast goes to the Everest peak,then:

$(1)$ $Cl^-$ translocation is required during the transport of $CO_2$.
$(2)$ The probability of lung cancer increases due to smoking.

Which of the following plants possesses sunken stomata?

Which two of the following changes $(i-iv)$ usually tend to occur in plain dwellers when they move to high altitudes ($3,500 \ m$ 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

At high altitudes,the number of red blood cells in humans: