Trace the events that could take place in a flower from the time the pollen grains of the same species full on the stigma up to completion of fertilization???
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When the pollen grains comes to stigma by pollination or cross pollination it sticks to it and secrets a chemical.This chemical produces a pollen tube which contains a male gamete .this gamete enters to ovary and it selects one ovule out of six.then fertilization starts and a zygote is formed.
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