Question

Assertion : Dark period is equally important for flowering like the light period
Reason : Flowering occurs in short day plants if the dark period is interrupted by light period

• A. Both assertion and reason are true and the reason is the correct explanation of assertion
• B. Both assertion and reason are true but the reason is not the correct explanation of assertion
• C. Assertion is true but reason is false
• D. Both assertion and reason are false

Answer 1

The correct option is C Assertion is true but reason is false

Flowering in plants depends on a combination of light and dark exposures for specific durations. This phenomenon is called photoperiodism.

Plants that require exposure to light for a period greater than critical period to trigger flowering are called long day plants.

Short day plants are those that require exposure to light for a period lesser than critical period to trigger flowering.

So if the dark period of a short day plant is interrupted with more light, then, that plant will not flower.