Question

Arrange in increasing power of osmotic pressure → Xerophytes, mesophytes, hydrophytes & halophytes.

Answer 1

Hint:Osmotic pressure is the minimum pressure required to stop the flow of solvent molecules across the semipermeable membrane. It prevents the inward flow of solvents. In other words, osmotic pressure is the tendency of a solution to take pure solvent via the process of osmosis.

Complete step by step answer:Osmosis is the process in which movement of water i.e. movement of solvent takes place from high water concentration to low water concentration through a semipermeable membrane. The pressure required to carry out osmosis is osmotic pressure.
Osmotic pressure is proportional to solute present in the solution means, more the solute more will be its osmotic pressure.
Plants surviving in different habitats have different cell water content as well as will have different solute content.
Xerophytes- Plants that survive in desert conditions where water availability is very less.
Mesophytes- These are terrestrial plants neither survive in wet conditions nor dry environmental conditions hence, called mesophytes.
Hydrophytes- These are aquatic plants surrounded by water and present inside water itself.
Halophytes-The plants growing in the saline environment are called halophytes. The salt content in the surrounding is very high. These plants are salt tolerant. The halophytic condition is physiologically dry.
From the above information, we can conclude that the site where water requirement is maximum must have low osmotic pressure.
The osmotic pressure of Halophytes becomes maximum and lowest for hydrophytes.
So, the correct increasing order for the power of osmotic pressure will be as below:
Hydrophytes → Mesophytes → Xerophytes → Halophytes.

Note:The more the water requirement less will be the osmotic pressure. Water is the universal solvent. The plasma membrane is semi-permeable.