$A$ long-day plant will show flowering when the critical photoperiod duration is as follows:
Duration of light period $= A$
Duration of dark period $= B$

  • A
    $A=13, B=11$
  • B
    $A=11, B=13$
  • C
    $A=12, B=12$
  • D
    $A=10, B=14$

Explore More

Similar Questions

Which proteinaceous pigment controls the light-dependent activities in plants?

Analogy type questions:
$(1)$ Coconut milk : Zeatin : : $ABA$ : ...............
$(2)$ Phenolic acid : Seed dormancy : : Cold treatment : ...............

What do you understand by photoperiodism and vernalisation? Describe their significance.

The flowering response of a plant can be changed by

Which of the following is a short-day plant?

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo