NEET BIOLOGY

Detailed explanation-1: -The pressure developed in the roots due to the continuous inflow of water helps in the pushing the plant sap upwards . This pressure is called root pressure.

Detailed explanation-2: -Root pressure is a positive hydrostatic pressure developed in the roots due to the continuous inflow of water.

Detailed explanation-3: -Due to active absorption of minerals, high osmotic potential is created. To reduce osmotic potential, water is absorbed, and hence, water potential is increased inside the xylem. Increased water potential also increases pressure in the xylem and this positive pressure is known as root pressure.

Detailed explanation-4: -The groundwater can be sucked upward by the soil through very small pores that are called capillars. This process is called capillary rise.

Detailed explanation-5: -The cohesion – tension theory of sap ascent explains how how water is pulled up from the roots to the top of the plant. Evaporation from mesophyll cells in the leaves produces a negative water potential gradient that causes water and minerals to move upwards from the roots through the xylem.