Stomatal Movements


 
 
Concept Explanation
 

Stomatal Movements

Stomata are the tiny pores present on the outer surface or epidermis of the leaves and in some cases also on the stem. These pores help in the exchange of gases,transpiration and photosynthesis. The opening and closing of stomata is controlled by Abscisic acid hormone. 

Structure of Stomata

A  stomata is consist of subsidiary cells, Guard cells and stomatal aperture. Subsidiary cells are the cells that surrounds the guard cells.Based on the number of subsidiary cells stomata can be of different types. Guard cells are bean shaped cells that surrounds the stomatal aperture. These cells regulate the closing and opening of stomata. Stomatal aperture is a tiny pore present on the surface through which exchange of material takes place.

Functions of Stomata

  • Regulate exchange of gases like oxygen and carbon dioxide gas.
  • Regulate the process of photosynthesis.
  •                              

    .... (More Text Available, Login?)
    Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    The closing and opening of stomata depends on the

    Right Option : B
    View Explanation
    Explanation
    Question : 2

    Which of the following is the function of stomata ?

    Right Option : D
    View Explanation
    Explanation
    Question : 3

    In plants like grasses the guard cells are of 

    Right Option : B
    View Explanation
    Explanation
     
    Video Link - Have a look !!!
     
    Language - Hindi/English
     
     
     
    Related Videos
    Language - Hindi/English
    Language - Hindi/English

    Language - Hindi/English
    Language - Hindi/English
    Language - Hindi/English

    Language - Hindi/English
    Language - Hindi/English
    Language - Hindi/English

    Language - Hindi/English
    Language - Hindi/English


    Students / Parents Reviews [10]