https://emsenn.net/tags/angiospermevolution/ Recent content in AngiospermEvolution on emsenn.net Hugo en-us Thu, 02 Apr 2026 00:00:00 +0000 https://emsenn.net/library/domains/science/domains/biology/domains/botany/terms/double-fertilization/ Thu, 02 Apr 2026 00:00:00 +0000 https://emsenn.net/library/domains/science/domains/biology/domains/botany/terms/double-fertilization/ <p>Double fertilization: the defining reproductive innovation of angiosperms, in which a single pollen tube delivers two sperm cells to the ovule. One sperm fuses with the egg cell to form the diploid zygote that will develop into the embryo; the other fuses with the central cell&rsquo;s two polar nuclei to form the triploid endosperm. This two-for-one event is unique to flowering plants and ensures that endosperm is produced only when fertilization occurs, eliminating wasted provisioning of unfertilized ovules.</p>