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(B) Plants are classified based on their response to the duration of light exposure,known as photoperiodism.$1$. Long-day plants $(LDP)$ require a lig

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Long-day plants

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(B) Plants are classified based on their response to the duration of light exposure,known as photoperiodism.$1$. Long-day plants $(LDP)$ require a light duration longer than a critical photoperiod to flower.$2$. Short-day plants $(SDP)$ require a light duration shorter than a critical photoperiod to flower.$3$. Day-neutral plants $(DNP)$ do not show any correlation between flowering and light duration.Therefore,plants requiring light greater than a critical duration are called long-day plants.

Some plants require a period of light greater than a critical duration for flowering. Such plants are called $..............$.

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