Question

What happens when a pollen grains falls on the stigma?

Answer 1

Pollen grain:

1. Pollen is necessary for the sexual reproduction of flowering plants and plants that produce cones.
2. Each pollen grain contains the male gametes necessary for fertilization.
3. The scientific study of living pollen grains and fossils is known as palynology.

Pollen grain on stigma:

1. The receptive tip of a carpel is stigma.
2. When the pollen grain lands on the stigma, chemical communication occurs between the pollen grain and the pistil, helping the pistil recognize the right type of pollen.
3. After acceptance, pollen begins to germinate and the pollen tube develops towards the ovary carrying the male gamete.