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Why is photoperiod important in plant growth?

Answer and explanation

Correct answer: It affects growth and flowering by determining daylight duration

The direct answer is A: photoperiod affects plant growth and flowering by determining the duration of daylight. Photoperiod means the length of light and dark periods in a daily cycle. Plants use light to make food by photosynthesis, and many plants also use day length as a biological signal for growth, dormancy, and flowering. Step by step: the season changes daylight duration; the plant detects this pattern; internal processes respond; growth or flowering may begin, slow, or change. Option A is correct. B is wrong because photoperiod does not remove salt from soil. C is wrong because it cannot make rainfall permanent. D is wrong because it has no power to flatten mountains. The exact response differs among plant species, but the basic link with day length is sound. Memory cue: photo means light; period means duration.

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PhotoperiodDaylightFlowering

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