Long Distance Transport of Water
Long Distance Transport of Water: Overview
This topic covers concepts, such as, Hydrostatic Pressure Gradient, Physical Properties of Water, Cohesion-Tension-Transpiration Pull Model & Transpiration Pull etc.
Important Questions on Long Distance Transport of Water
Which of the following helps in ascent of sap?
The force between the water column and tracheary elements that prevent its fall down is called _____.(write one word)
Define the cohesive property of water.
Who gave the theory of Cohesion Tension-Transpiration pull?
The column of water does not fall down under the effect of gravity because of adhesion, cohesion and surface tension of water molecules. It is related to which of the following?
What are the properties of water that help in the ascent of sap in the plants.
Explain how the hydrostastic pressure gradient helps in the transport of water in plants.
Transpiration reduces the hydrostatic pressure in the xylem and water moves into the root and across the root cortex in response to the pressure gradient so produced.
Large positive values of hydrostatic pressure in a plant cell is induced by _____.
What is hydroststic pressure gradient in plant cells?
The endodermis is impermeable to water due to _____ deposition.
Which of the following pathway/s of water flow is/are done by osmosis?
Osmosis is involved in the apoplastic pathway.
The endodermis is impervious to water.
Transpiration pull theory is considered best to explain the ascent of sap.
Fill in the blank with the correct option provided in the bracket.
Cohesion-tension theory is also known as _____. (root pressure theory/ capillary theory/ transpiration pull theory)
Which is the barrier for the apoplastic pathway, whether it is Casparian strips or Plasmodesmata?
A portion of a transverse section of the root is shown in the diagram. Identify A-H in the given diagram and choose the correct option.
Which of the following is not take part in the ascent of sap through the xylem in tall plants?
Which of the following statements are correct?
i. Symplast and vacuolar pathway are in living part of the cell.
ii. Symplast interconnects the nearby cell through plasmodesmata.
iii. Water passes through the tonoplast in vacuolar pathway.
iv. Apoplast is fastest and operates in the nonliving part.
