NCERT Question 6 - Chapter 7 Class 10 - Control and Coordination

Last updated at August 14, 2026 by

How does phototropism occur in plants?

 

Answer

Phototropism is the movement with respect to growth of plants towards the sunlight.

  • Once the plant detects sunlight , the hormone auxin is secreted at the shoot tips .
  • The secreted auxins diffuse towards the shady side of the plant
  • This makes the cells on the shady side grow longer
  • Thus, the plant appears to bend towards light . 

AUXIN AND PHOTOTROPISM - Teachoo.jpg

Example of Phototropism:

Sunflowers grow towards the sunlight

RESPONSE OF THE PLANT TO THE DIRECTION OF LIGHT - Teachoo.jpg

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