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Transport in Plants
Question
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Living. cells placed in isotonic solution (0.9% saline) retain their size and shape. This is based on the concept of

  • osmosis

  • diffusion

  • facilitated diffusion

  • transpiration

Answer

A.

osmosis

When living cells are placed in isotonic solution, they retain their shape and size as such because no osmotic movement of water molecules takes place.

If a plant cell is placed in hypertonic solution, the cell gets plasmolysed due to exosmosis. On the other hand, if a plasmolysed cell is placed in hypotonic solution, endosmosis occurs and the cell gets deplasmolysed.

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Some More Questions From Transport in Plants Chapter

Name the two forces responsible for the rise of water in a capillary tube.

Which force is first operative in translocation of water through capillarity : cohesive force or adhesive force ?

Name the driving force for water movements in plants.

What are the two factors which affect osmosis?

What is the condition of having more stomata on the lower surface called? 

Name the plant having more stomata on lower surface than on upper surface.

Name the plant having equal number of stomata on both surfaces.

Name the substance which has maximum imbibition capacity.

Rubber cannot imbibe water. Name the solvent which can be imbibed by it.

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