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 $transpiration$.

- Transport of water and minerals in $Xylem$ is $\underline{A}$.
- Transport of organic and mineral nutrients is $\underline{B}$.

Identify the correct statements from the following:
$I-$ Xylem transports only inorganic nutrients.
$II-$ Phloem transports only organic materials.
$III-$ There is an exchange of materials between xylem and phloem.
$IV-$ In xylem,inorganic nitrogen is present along with organic nitrogen in the form of amino acids and other components.
$V-$ Organic phosphorus and sulfur are also found in xylem tissue.

$A-$ Diffusion is a very slow process and is responsible for the short-distance movement of molecules.
$R-$ Water,minerals,and food are generally moved by a mass or bulk flow system.

In how many hours,a mustard plant absorbs water equal to its own weight?

The phenomenon of guttation: