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The movement of sunflower in accordance with the path of the sun is due to 

(a) phototropism 

(b) geotropism 

(c) chemotropism 

(d) hydrotropism

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The answer is (a) phototropism

  • The movement of shoot towards light is called phototropism. 
  • Plant growth in response to gravitational force is called as geotropism .
  • Growth of plant in response to chemical stimulus is called chemotropism. 
  • Growth of plant roots towards or away from moisture is called hydrotropism.

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