SSC
BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
What can be used to promote off-season flowering in long-day plants?
|
|
Close blinds at the end of the night to delay the start of the light period
|
|
|
Interrupt the day with a period of darkness.
|
|
|
Extend the cycle of light and dark to more than 24 hours.
|
|
|
Turn on the lights during the night for a brief period.
|
Explanation:
Detailed explanation-1: -Flowering in long-day and short-day plants is controlled by a pigment called phytochrome. This pigment exists in two forms, Pr and Pfr, which can be converted into each other. The Prform is the inacctive form and absorbs red light with a wavelength of 660 nm.
There is 1 question to complete.