Problem 158
Assertion: The more the solute molecules in solution, the lower (more negative) is the solute potential of solution. Reason: For a solution at atmospheric pressure, water potential = solute potential.
Problem 159
Assertion: In apoplast, the water movement is through mass flow. Reason: The apoplast does not provide any barrier to water movement.
Problem 160
Assertion: Transport saturates in facilitated diffusion. Reason: Facilitated diffusion occurs through protien molecule.
Problem 161
Assertion: Light is a very important factor in transpiration. Reason: It induces stomatal opening and darkness closing. Therefore, transpiration increases in light and decreases in dark.
Problem 163
Assertion: Guttation liquid is found on the margins of leaves of herbaceous plants. Reason: Hydathodes are found on the margins of herbaceous plant.
Problem 164
Assertion: Transpiration occurs when stomata are open. Reason: Transpiration occurs only through stomata.
Problem 165
Assertion: Transport of sucrose from leaf to root is called translocation. Reason: This is long distance transport through vascular system of plant.
Problem 166
Assertion: Movement by diffusion is passive process. Reason: No energy expenditure takes place during diffusion.
Problem 167
Assertion: Molecules up to small size of protein can pass through outer membrane of plastids. Reason: Outer membrane of plastids contain porins
Problem 168
Assertion: Water is often the limiting factor for plant growth and productivity. Reason: Large amount of water is required by plants.
