The figure given above shows the growth of pollen tube. Observe the figure and answer the following question.

The site of germination of pollen grains is:

Stigma

The correct answer is Option (1) → Stigma

The stigma is a crucial part of the pistil, which is the female reproductive organ of a flower. It plays a vital role in the process of pollination and fertilization. The primary function of the stigma is the reception of pollen grains.

When a flower is ready for pollination, the stigma serves as a landing platform for pollen grains. It is often located at the top of the pistil, positioned to receive pollen from visiting pollinators or through other means of pollination, such as wind or self-pollination.