Which of the following is not correct for photoperiodism?
i) Flowering response of plants to periods of day/night is termed photoperiodism
ii) Long day plants require the exposure to light for a period exceeding a well-defined critical duration for flowering
iii) Short day plants must be exposed to light for a period less than this critical duration before the flowering is initiated in them
iv) The critical duration is same for different plants
v) Day – neutral plants not have any correlation between exposure to light duration and induction of flowering response
vi) Duration of light period and duration of dark period is not equally important for flowering

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(iv) and (vi)

(i) and (ii)

(v) and (vi)

(ii), (iii), (v) and (vi)

answer is C.

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Detailed Solution

iv. The critical duration is different for different plants. The critical duration for various plants can vary significantly based on the specific plant species, its growth requirements, and its life cycle. Critical duration refers to the specific period of time or environmental conditions during which a particular developmental process or physiological response is most sensitive or critical.

vi. Duration of light period and duration of dark period is equally important for flowering

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