AP BIOLOGY

Detailed explanation-1: -As various ions from the soil are actively transported into the vascular tissues of the roots. Water follows its potential gradient and increases the pressure inside the xylem. This positive pressure is called root pressure.

Detailed explanation-2: -Xylem is responsible for the transport of water and dissolved ions from the roots upwards through the plant.

Detailed explanation-3: -When various ions from the soil are carried into the vascular tissues of the roots, water follows, increasing the pressure inside the xylem. This pressure is known as root pressure. Root pressure pushes up water in small stems. Thus, root pressure is said to be positive.

Detailed explanation-4: -Osmosis is a process in which water molecules diffuse through a semipermeable membrane from more dilute solution to less dilute solution. Root hairs are highly osmotic than soil. So, water easily enters in the roots.

Detailed explanation-5: -Xylem transports water, minerals, and nutrients from the soil to all the plant parts. There are two types of “transport” tissues in plants-xylem and phloem. Water and solutes are transported by the xylem from the roots to the leaves, and food is transported from the leaves to the rest of the plant by the phloem.