NCERT Solutions for class 11 Biology Chapter 11 : Transport in Plants

Plants use chlorophyll, present in the leaves, to photosynthesize energy using CO₂. As multicellular organisms, plants have specialized groups of cells performing different functions. The roots absorb raw materials such as phosphorus, nitrogen, and other minerals necessary for the sustenance of the plant.

• Simple Diffusion

Here, the molecules move from a region of higher concentration to a region of lower concentration. This process requires no energy.

• Active Transport

This mechanism helps to transfer molecules from a region of lower to a region of higher concentration with the help of membrane proteins. This system is called active transport as it requires ATP to function.

• Water Potential

Water potential is used by the plants so that they can transport water to the leaves that help in carrying out photosynthesis. Solute potential and pressure potential are the two main components of water potential.

• Osmosis

It can be defined as the movement of molecules from a region of higher concentration to a region of lower concentration across a semi-permeable membrane until an equilibrium is reached.

• Plasmolysis

Plasmolysis refers to the process in which plant cell loses water when placed in a hypertonic solution. It depends upon three types of solutions: