In short day plants $(SDP)$,flowering is induced by

Vernalization is defined as .....

Which two factors primarily affect the developmental phase of growth of plants?

What is the action spectrum of photoperiodism?

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

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.