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Double fertilization refers to a process in angiosperms(flowering plants) during reproduction, in which two sperm cells fertilize two cells in the ovary. The pollen grain adheres to the stigma of the carpel (female reproductive structure) and grows a pollen tube that penetrates the ovum through a tiny pore called a micropyle. Two sperm cells are released into the ovary through this tube. One of the two sperm cells fertilizes the egg cell, forming a diploid zygote. The other sperm cell fuses with a diploid cell in the center of the embryo sac. The resulting cell is triploid (3n). This triploid cell divides through mitosis and forms the angeosperm, a nutrient rich tissue inside the fruit. Wikipedia does not have an article with this exact name. ... A spermatozoon fertilising an ovum Fertilization (also known as conception, fecundation and syngamy) is fusion of gametes to form a new organism. ... Classes Magnoliopsida - Dicots Liliopsida - Monocots The flowering plants (also angiosperms or Magnoliophyta) are one of the major groups of modern plants, comprising those that produce seeds in specialized reproductive organs called flowers, where the ovulary or carpel is enclosed. ...

Humans and other animals ingest this tissue for nutrition.