Cell walls of root hairs for absorbing water must be

Select the correct statement$(s)$ regarding bulk flow.
$I-$ In tall plants,water,minerals,and food are moved by a bulk flow system.
$II-$ This type of movement is achieved through a pressure difference between two points.
$III-$ In bulk flow,substances,whether in solution or suspension,move at the same pace as in a flowing river.
$IV-$ This process is similar to diffusion.

Which is an important property of water?

Due to which property of water does the water in lakes or oceans not freeze completely?

The passive accumulation of fixed and non-diffusible ions can be explained by which theory?

The plants that grow on saline soils with high concentration of $NaCl$,$MgSO_4$ and $MgCl_2$ are called: