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December 7th

  • Petal power: How flowering plants conquered the world - life - 29 October 2008 - New Scientist: - Angiosperms are the flowering plants - Gymnosperms are coniferous (pines, gingoes) - There are 300,000 species of angiosperm compared with just 1000 gymnosperms - Double fertilisation occurs, with one sperm fertilising the egg and another fertilising a neighbouring cell that will develop into a food supply for the embryo. Double fertilisation is unique to angiosperms and it gave them two important evolutionary advantages. First, embryo and food supply start growing at the same time, which makes angiosperms faster breeders than gymnosperms. Second, the nourishing tissue is only produced if fertilisation has occurred, which means precious resources are conserved.

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  • Plants Main Page: This site contains information, graphics and quizzes on the topic of plants.
  • Biology4Kids.c om: Plants: Biology4Kids.c om! The web site that teaches the basics of biology and life science to everyone!

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