The process by which plants lose water in liquid form is called $P$,while the process by which plants lose water in the form of vapor is called $Q$.

Stomata in angiosperms do not open during:

What will be the effect of accumulation of potassium ions in guard cells?

Describe: Transpiration.

$A$ are structures present in the epidermis of leaves. They regulate the process of transpiration and $B$ exchange. It is composed of two bean-shaped cells known as $C$ cells.
Choose the correct combination of $A, B$ and $C$ from the following options:

Which of the following is ineffective on transpiration?