The reproduction of flowering plants begins with pollination (It has two types: Self-pollination and Cross pollination). Once the pollen grain lodges on the stigma, a pollen tube grows from the pollen grain to an ovule. Two sperm nuclei then pass through the pollen tube. One of them unites with the egg nucleus and produces a zygote. The other sperm nucleus unites with two polar nuclei to produce an endosperm nucleus (This process is identified as double fertilization). The fertilized ovule develops into a seed.
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Explanation:
The reproduction of flowering plants begins with pollination (It has two types: Self-pollination and Cross pollination). Once the pollen grain lodges on the stigma, a pollen tube grows from the pollen grain to an ovule. Two sperm nuclei then pass through the pollen tube. One of them unites with the egg nucleus and produces a zygote. The other sperm nucleus unites with two polar nuclei to produce an endosperm nucleus (This process is identified as double fertilization). The fertilized ovule develops into a seed.