A long-day plant will flower

Question

Quizplus · Accepted Answer

Long-day plants require a critical period of darkness (night length shorter than a critical value) in order to flower, so option B is correct. Option A is incorrect because the late fall typically has longer nights than the critical value for long-day plants. Option C is incorrect because long-day plants will flower naturally during the summer months when the days are longer, not just under artificial light. Option D is incorrect because the photoperiod (day/night length) is a crucial factor in determining flowering in long-day plants.

A Long-Day Plant Will Flower