[坎贝尔生物学 第1415页] Campbell Biology 12th Edition
G-12 GLOSSARY two polar nuclei during double fertilization. The endosperm provides nourishment to the developing embryo in angiosperm seeds. endospore A thick-c
G-12 GLOSSARY two polar nuclei during double fertilization. The endosperm provides nourishment to the developing embryo in angiosperm seeds. endospore A thick-c