Question

how roots transport the water to all parts of the plant during night time

Answer 1

through respiration root can supply water during night time

Answer 2

The amount of energy required by plants is lower compared to that of animals, hence there is a requirement of slower transportation. In plants, a tube-like passage made up of vascular tissues called xylem and phloem are two modes of transportation. Water and minerals travel upwards through the xylem, while phloem transport synthesized food to other parts of the plant. The movement of water and other nutrients from one part of a plant to another is called translocation. Water gets absorbed by osmosis while minerals by active transport. The method used in the upward movement of water through the xylem is determined by the cohesion-tension theory. Here the driving force of transport is transpiration. In this process, cohesion is responsible for driving more water through the xylem and excess water molecules are pulled up by the pulling force which later evaporates through the tiny pores of stomata.