x
uploads/external fertilization.jpg

external fertilization 卵細胞體外人工授精。

external galaxy

External fertilization occurs when gametes are expelled into a watery substrate from the parental bodies before fusion ; it is typical of sporebearing plants 當配子在融合之前從親本體中排出到有水介質時發生體外受精,這是孢子植物的特征。