Explain why the process of fertilisation is the same for self-pollinating flowers and cross-pollinating flowers.
Question
Explain why the process of fertilisation is the same for self-pollinating flowers and cross-pollinating flowers.
Solution
The process of fertilisation is the same for both self-pollinating and cross-pollinating flowers because it involves the same fundamental steps. Here's a step-by-step explanation:
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Pollination: This is the transfer of pollen from the anther (male part) of a flower to the stigma (female part). In self-pollinating flowers, this transfer occurs within the same flower or between flowers of the same plant. In cross-pollinating flowers, the transfer occurs between flowers of different plants.
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Germination of Pollen: Once the pollen lands on the stigma, it begins to germinate, forming a pollen tube that grows down through the style towards the ovary.
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Transfer of Sperm Cells: Each pollen grain contains two sperm cells. These cells travel down the pollen tube towards the ovule in the ovary.
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Fertilisation: One sperm cell fertilises the egg cell in the ovule, forming a zygote. This is the actual fertilisation process. The second sperm cell fuses with two other cells in the ovule to form the endosperm, which will nourish the developing embryo.
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Formation of Seed
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