CONTROL & COORDINATION

 

SCIENCE CLASS 10TH CHAPTER-CONTROL AND COORDINATION FORMULA & IMPORTANT POINTS

Science Formulas

Class- 10 for chapter-Control and coordination 

control and coordination

Tropic Movement     

PhototropismIn response to light
ChemotropismIn response to chemical
HydrotropismIn response to water
GeotropismIn response to gravity
ThigmotropismIn response to touch

Nastic Movement

  • Thighmonasty (e.g. Mimosa Pudica)
  • Photonasty (e.g. Dandelion flower)

ROLE OF PHYTOHORMONES

       
S. No.HormoneFunctions
1.Auxin
  • Promotes cell enlargement and cell

    differentiation (e.g. growth of stem).

  • Promotes fruit growth.
2.Gibberellins
  • Promotes cell enlargement and cell differentiation in presence of auxin.

    cell differentiation in presence of auxin.

3.Cytokinin
  • Promotes cell division i.e. cytokinesis (e.g. in fruits and seeds).
  • Helps in breaking the dormancy of seeds and buds.
  • Promotes opening of stomata
4.Abscisic Acid
  • Promotes the dormancy in seeds and buds.
  • Promotes the closing of stomata.
  • Promotes the wilting and falling of leaves.

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