Plants Bloom Only When the Duration of Uninterrupted Darkness Is

Question

plants bloom only when the duration of uninterrupted darkness is shorter than a critical length.
A) Short- day
B) Phytochrome- system
C) Neutral- day
D) Gibberellin- regulated
E) Long- day

Accepted Answer

Long-day plants bloom when the duration of uninterrupted darkness is shorter than a critical length, meaning they require longer daylight periods to flower.