The pigment involved in red-far red light interconversion is

On germination,a seed first produces shoots with leaves,and flowers appear later.
$(A)$ Why do you think this happens?
$(B)$ How is this advantageous to the plant?

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

In which category will you place this plant based on the provided experimental results? Choose the correct option.

The pigment phytochrome is involved in:

What happens if winter-growing plant species are sown in the spring season?