Pyq- Sexual Reproduction In Flowering Plants

2015: What happens to the pollen tube after it enters the stigma of a flower?

After the pollen tube enters the stigma of a flower, it grows down the style and into the ovary. The pollen tube then releases two sperm cells into the ovary. One sperm cell fertilizes the egg cell in the ovule, forming a zygote. The other sperm cell fertilizes two polar nuclei in the ovule, forming a triploid endosperm nucleus. The zygote develops into an embryo, and the endosperm provides nutrients for the developing embryo.

2016: What are the male and female reproductive organs of a flower?

The male reproductive organs of a flower are the stamens. Each stamen consists of a filament and an anther. The anther produces pollen grains, which contain the male gametes (sperm cells).

The female reproductive organs of a flower are the pistils. Each pistil consists of a stigma, a style, and an ovary. The stigma is the sticky part of the pistil that receives the pollen grains. The style is the tube that leads from the stigma to the ovary. The ovary contains the ovules, which are the female gametes (egg