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

Phytochrome-mediated process is:

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.

Which of the following is a short day plant?

The site of perception of light for photoperiodism is:

Some plants require exposure to light for a period exceeding a well-defined critical duration. These plants are known as: