Define the following terms:
$(1)$ Development
$(2)$ Light period

$A$ short-day plant was exposed to alternating red-far red light treatments. What would happen if the last treatment was of far-red light?

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.

$A$ pigment responsible for light sensitivity in plants is

The red absorbing form of phytochrome gets converted to the far-red absorbing form after getting irradiated at

Differentiate between Phototropism and Photoperiodism.