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Plant - Growth ...

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  • Question 1
    4 / -1

    The plant which requires an exposure to light for a period greater than critical day length is

  • Question 2
    4 / -1

    Which of the following is correct about phytochrome?

  • Question 3
    4 / -1

    Photoperiod stimulus is perceived by___pigmen

  • Question 4
    4 / -1

    The given figure shows flowering responses of three plants A, B and C to the photoperiod. Select the correct option regarding this.

  • Question 5
    4 / -1

    Maryland mammoth tobacco is a short day plant. Its critical duration of darkness is 10 hours. Under which of the following conditions will it not flower?

  • Question 6
    4 / -1

    Sedum is a long day plant. Its critical duration of light is 13 hours Under which of the following conditions would it flower?

  • Question 7
    4 / -1

    Four potted plants (I, II, Ill, and IV) of a short day plant, which has the critical period of 14 hours; are taken and exposed to light for different time periods. The light periods given are listed in the table.

    Which potted plant will show flowering after exposure to light?

  • Question 8
    4 / -1

    Low temperature treatment to speed up the process of flowering is referred to as

  • Question 9
    4 / -1

    Cabbage is a biennial plant which produces flowers in the second year of growth. In an attempt to make it flower in a single year, four potted plants (I, II, III, and IV) of cabbage were subjected to different temperatures for several days given in the table.

    Which potted plant will show flowering?

  • Question 10
    4 / -1

    Vernalisation can often be replaced by

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