what happens if a pollen grain falls on a stigma?
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When the pollen grains falls on the stigma, the pollen passes through the pollen tube and goes to ovaries in which the egg is present and then the fertilisation occurs there and zygote is formed.
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When a pollen grain lands on the stigma of a flower of the correct species , a pollen tube begins to grow. It grows through the style until it reaches an ovule inside the ovary. The nucleus of the pollen then passes along the pollen tube and fuses (joins) with the nucleus of the ovule.
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