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Assertion:If the day length is shorter than the critical period, the long day plants do not flower.
Reason: For long-day plants to flower, they need light that is significantly greater than their critical photoperiod.
If both assertion and reason are true and the reason is the correct explanation of the assertion
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If both assertion and reason are false.
If the assertion is true but the reason is false
Answers (1)
Long day plants (LDP) begin flowering when the length of the day exceeds a threshold length. This length also varies across species. If the day length is less than the critical period, the long day plants do not flower. Spinach (Spinacea oleracea), henbane (Hyoscymus niger), radish, sugar beetroot, wheat, lettuce, poppy, larkspur, maize, and other plants are examples.
Long day plants need light that is much higher than the required photoperiod for optimal flowering. They typically flower during the seasons when the days are long, such as early summer and late spring.
Option 1 is the correct answer.
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