Which of the following statements are wrong?
(i) Mass flow of substances inside the plant is the result of pressure differences between the two points
(ii) Diffusion cannot account for long distance movement of water and solutes in plants
(iii) Movement through apoplast does not involve crossing the cell membrane
(iv) The movement of water through endodermis is only through symplast

(i)

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(ii)

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(iii)

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none

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Solution

The correct option is D none
Mass flow of substances inside the plant is due to either a positive or a negative pressure gradient. Transport of substances can occur because of diffusion only through short distances. In the apoplast pathway, water moves outside the cell membrane. Endodermis has an impermeable casparian strip around the cell walls. Only some cells do not have the casparian strip, and water flows through these using the symplast pathway. Hence, none of the given statements is wrong.

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Similar questions

Which of the following statements are wrong?
(i) The mass flow of substances inside the plant is the result of pressure differences between the two points
(ii) Diffusion cannot account for long distance movement of water and solutes in plants
(iii) Movement through apoplast does not involve crossing the cell membrane
(iv) The movement of water through endodermis is only through symplast

Which of the following statements are wrong?
(i) Mass flow of substances inside the plant is the result of pressure differences between the two points.
(ii) Diffusion cannot account for long distance movement of water and solutes in plants.
(iii) Movement through apoplast does not involve crossing the cell membrane.

Q. Identify the correct statement related to water movement in deeper layers of the root.
A. Apoplastic movement of water does not involve the crossing of the cell membrane.
B. Symplastic movement is aided by cytoplasmic streaming.
C. Most of the water movement in the root is through symplast.
D. Water movement through the root layers is ultimately symplastic in the endodermis.

Q. Which of the following is true/false regarding transport of substances in plants?
(i) Mass flow is the movement of substance in bulk as a result of pressure difference.
(ii) Bulk flow is achieved only through a positive hydrostatic pressure gradient.
(iii) The apoplast system is the system of interconnected protoplasts.
(iv) Most of the water flow in the roots occurs via the apoplast since the cortical cells are loosely packed, and offer no resistance to water movement.

Q. Which of the following statements is/are true?
A. The apoplastic movement of water occurs exclusively through the cell wall without crossing any membranes.
B. Solutes present in a cell (or in any solution) increase the free energy of water or water potential.
C. The symplastic movement occurs from cell to cell through the plasmodesmata.
D. Membrane permeability depends on the membrane composition, as well as the chemical nature of the solute.

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