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Question

The promotion of flowering by providing exposure to a period of low temperature is referred to as .

A
thermoperiodism
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B
photoperiodism
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C
vernalisation
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D
phototropism
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Solution

The correct option is C vernalisation
Vernalisation refers to the promotion of flowering by exposing the plant to a period of low temperature. Some important food plants like wheat, barley have two kinds of varieties: winter and spring. Spring variety are normally planted in spring and they do not need vernalisation. Winter variety need vernalisation to flower or to produce mature grain.

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