Effect of photoperiod on growth and development of plants,especially on flowering,is called

  • A
    Vernalisation
  • B
    Photoperiodism
  • C
    Heterophylly
  • D
    Phototaxis

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Which of the following is a long-day plant?

At which wavelength is light absorbed by the phytochrome in the $P_r$ form (in $, nm$)?

During vernalisation,the stimulus of low temperature is perceived by

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During the photoperiodic induction,$........$ is translocated from leaves to shoot buds to induce flowering.

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