The scientist who proposed that the production of glycolic acid in guard cells is an important factor in stomatal opening is:

In high-altitude regions,the $R.B.C.$ count in humans will . . . . . . .

What are the functions of hemoglobin and chlorophyll?

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

What is the approximate amount of $CO_2$ eliminated by our lungs per day?

Arrange the given steps of the respiration mechanism in the order they occur in the human body:
$I.$ Breathing or pulmonary ventilation
$II.$ Diffusion of $O_2$ and $CO_2$ between blood and tissues
$III.$ Transport of gases by blood
$IV.$ Utilisation of $O_2$ by cells
$V.$ Diffusion of $O_2$ and $CO_2$ across the alveolar membrane
Choose the correct option.