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

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

Select the correct statements from the following regarding gaseous exchange in plants.
$A$. $A$ terrestrial plant has many air spaces between the cells of leaf and root.
$B$. Woody trees have stomata on bark.
$C$. In aerated soil,oxygen dissolved in water enters root tissue by diffusion.
$D$. Vascular bundles provide thin and large surface area for exchange of gases.
$E$. Carbon dioxide and water vapour diffuse into lenticels.

In terrestrial plants,guard cells differ from other epidermal cells in having:

During hibernation,the body temperature of warm-blooded animals remains:

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.