Which of the following is required for the formation of flowers in the plants?
A
Adequate oxygen
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B
Definite photoperiod
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C
Adequate manure
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D
Adequate water and mineral
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Solution
The correct option is B Definite photoperiod Photoperiodism is the phenomenon in which formation of flowers in plants depends on the relative length of dark or light periods. Short day plants are those plants that require long period of darkness and short period of light to flower. Long day plants are those plants that will flower when they are exposed to short period of darkness and long period of light.