2. Solved Papers
  3. WB JEE Medical

WB JEE Medical WB JEE Medical Solved Paper-2006

  • question_answer
    The plants respond to photoperiods due to the presence of:

    A)  enzymes                            

    B)  stomatas

    C)  phytochromes                                

    D)  phytohormones

    Correct Answer: C

    Solution :

                    Photoperiodism is a biological response to change in the ratioof light and dark periods in 24 hours cycle. It is regulated by the photo reversible pigment called phytochrome. Phytochrome is a photoreceptor chromoprotein.


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