The normal temperature of the human body on the Kelvin scale is

The percentage of oxygen in inhaled air is about (in $\%$)

Which of the following cells are not related to the structure of stomata?

$A$: Stomata are responsible for providing food to the plant while preventing water loss.
$R$: Stomata are specialized pores primarily designed for gaseous exchange.

Percentage of $O_2$ present in inhaled air in man is about (in $\%$)

The normal rate of breathing in a healthy human adult is: