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

We know that plants are harmed by excess water. However,some plants survive under flooded conditions. How are they able to manage excess water?

Respiration is a ........ process.

Which of the following structures is lined by guard cells?

Why do plants not have respiratory organs?

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.