1. Take two slides. Put 2-3 drops of water on them. Add some sugar grains to water on one side.
2. Now put some pollen grains of Hibiscus flower on both the slides. After one hour observe under microscope. We find pollen grains germinate on the slide containing sugar grain.
3. There are some substances present on the stigma which promote the germination of the pollen grains.
4. During germination a tube grows from the pollen grain.
5. This tube ultimately reaches the ovary through the style with the male part.
6. This male part fuses with the female part in the ovule of the ovary.
7. Fusion of units of male and female parts to form a structure called as zygote is called Fertilization.
