The Mystery of Sex, or Sex Polarity

carried by bees, moths, or similar insects, "from other flowers of the same species." This is what is called cross-fertilization. Darwin found that twenty heads of Dutch clover left open to visits from bees produced 2,290 seeds; the same number protected original: "defended" from the visits of bees did not yield even a single seed."

Plant life provides many strange and interesting examples of ingenious methods arranged by nature to attract the insects needed to fertilize it. The bright colors of flowers and the nectar original: "honey or sweet fluids" contained within many flowers are intended solely for this purpose. The shape and size of the various parts of the flowers are arranged to cause a bee or other insect to first brush against the organ original: "receptacle" containing the pollen, and then to brush that same pollen off into the female parts of other flowers. This subject is extremely interesting and will well reward anyone who studies it in detail in the textbooks on the matter.