The term 'Guttation' was coined by:

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

Process of exchange of $O_{2}$ from the atmosphere with $A$ produced by the cells is called $B$, which is commonly known as $C$. Choose the appropriate options for the blanks $A$, $B$, and $C$ to complete the given $NCERT$ statement.

If a bird's egg is coated with varnish and then incubated,it will not hatch because the developing embryo...

The amount of $CO_2$ in atmospheric air is: (in $\%$)

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