NTA Abhyas NEET2020BotanyPlant - Growth and DevelopmentPractice
Long day plants show flowering when
Options
- Athe light period is greater than their critical photoperiod.
- Bthe light period is lesser than the critical photoperiod.
- Cthe day length is longer than 15 hours but interrupted by short dark period.
- Dthe day length is shorter than a critical period.
Correct answer
A. the light period is greater than their critical photoperiod.
Step-by-step solution
Long day plants require a light period greater than the critical length to flower. Leaves perceive the photoperiod and causes production of a hypothetical flowering hormone which promotes flowering.