A long-day plant will show flowering when the | vedclass

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(A) Long-day plants $(LDP)$ flower only when they are exposed to a light period longer than a certain critical duration. Based on the provided graph,t

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$A=13, B=11$

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(A) Long-day plants $(LDP)$ flower only when they are exposed to a light period longer than a certain critical duration. Based on the provided graph,the critical photoperiod for the long-day plant is approximately $12$ hours. Therefore,for flowering to occur in a long-day plant,the duration of the light period $(A)$ must be greater than the critical value (i.e.,$A > 12$ hours). Among the given options,$A=13$ hours and $B=11$ hours satisfies the condition where the light period is longer than the critical photoperiod.

$A$ long-day plant will show flowering when the critical photoperiod duration is as follows:
Duration of light period $= A$
Duration of dark period $= B$

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$A$ long-day plant will show flowering when the critical photoperiod duration is as follows:Duration of light period $= A$Duration of dark period $= B$