There is intimate coevolution between flower and pollinator. Refers to the fusion of sperm and egg, occurs in ovule. One sperm fuses with egg to produce the zygote. The endosperm is a nutritive tissue that will be saved primarily for the seed to be used when it is germinating. Pollination and fertilization are different.
Plant sex is twice as much fun.
This process, double fertilization, is unique to flowering plants. Plant embryos are not miniaturized adults. Embryogenesis refers to the sequence of developmental events that produce the embryo. Embryo development in plants is discontinuous. In other words, after the embryo develops a while, it undergoes a dormant period.