Most of the winter flowering plants belong to

Assertion $(A)$: Vernalization is the acceleration of subsequent flowering by low-temperature treatment.
Reason $(R)$: The site of vernalization is the apical meristem.

Which of the following statements are $INCORRECT$ with respect to phytochrome?
$i$. Phytochrome is a light-receiving proteinaceous pigment present in the leaves of plants.
$ii$. Phytochrome pigment exists in two forms.
$iii$. Two forms of phytochromes are interconvertible.
$iv$. Phytochromes are located in the chloroplast of green cells.
$v$. Phytochrome $P_r$ form inhibits flowering in $LDP$ during the dark period.

What is the effect of temperature and light on plant growth regulators in plants?

The site of perception of light in plants during photoperiodism is:

The proteinaceous pigment that acts as the center of activities concerned with light is: