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CBSE - X - Biology - How Do Organisms Reproduce?

What is double fertilisation?

Asked by naveen.mohandas 7th February 2011, 9:19 PM
Answered by Expert


Dear student,
Double fertilization is unique to the angiosperms. It is the process in which the two sperm nuclei of a pollen grain unite with nuclei of the embryo sac of an angiosperm plant. One sperm nucleus unites with the egg to form the diploid zygote, from which the embryo develops. The other sperm unites with the two nuclei located in a single cell at the center of the embryo sac. Together these nuclei form the triploid nucleus of the cell from which the nutritive endosperm develops that will provide energy for the embryo's growth and development.
Team Topperlearning
Answered by Expert 8th February 2011, 4:30 AM

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