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Transport in Plants
Question
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Guard cell help in

  • protection against grazing

  • transpiration

  • guttation

  • fighting against infection

Answer

B.

transpiration

Guard cells help in transpiration. Each stomatal opening is surrounded by two specialized epidermal cells, called guard cells. Because of their small size guard cells are rapidly influenced by turgor change and thus regulate the opening and closing of stomata.

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Some More Questions From Transport in Plants Chapter

What is capillarity ?

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.