The phenomenon of guttation:

During which process in leaves is the water potential positive?

Assertion: When the ambient temperature is high and soil contains excess of water,the plants tend to lose water in the form of droplets from lenticels.
Reason: Root pressure regulates the rate of loss of water from lenticels.

Choose the correct option:
$(1)$ The transport in xylem is always $unidirectional$.
$(2)$ The process of loss of water in the form of vapour by plants is called $transpiration$.

Which of the following statements are correct regarding the factors affecting absorption by plants?
$i$. In dicots,the guard cells are dumbbell shaped.
$ii$. The transport of food through phloem is bidirectional.
$iii$. Capillary water is available to plants.
$iv$. Lenticels are small,raised structures composed of compactly arranged complementary cells.
$v$. Stomatal transpiration occurs during day time only.
Choose the correct option:

Select the correct option regarding the vascular tissues in plants.