Multiple choice Unisexuality of flowers prevents autogamy, but not geitonogamy geitonogamy and xenogamy geitonogamy, but not xenogamy autogamy and geitonogamy Reveal answer Fill a bubble to check yourself A Correct answer Explanation Unisexuality of flowers prevents autogamy (self pollination) but not geitonogamy (pollination betweenseparate male and female flowers on the same plant).