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Why fertilization cannot take place in flowers if pollination does not occur?
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Ans.
Fertilization cannot take place in flowers if pollination does not occur because without pollination male and female gametes cannot come closer. Pollination is the process by which the pollen is transferred from the anther or male part to the stigma or the female part of the plant. Fertilization requires male and female gametes. Hence pollination of any kind (autogamy, geitonogamy, xenogamy) is required to get male and female gametes closer.
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