• 2021-04-14
    子房胚珠胚囊受精卵,发育成__________受精极核,发育成__________助细胞(消失)反足细胞(消失)珠心,消失或发育成__________珠被,发育成__________珠孔,发育成__________珠脊珠柄,发育成__________种子胎座子房壁,发育成__________果实