Archive image from page 280 of Bees & bee-keeping; scientific and. Bees & bee-keeping; scientific and practical. A complete treatise on the anatomy, physiology, floral relations, and profitable management of the hive bee CUbiodiversity1154323 Year: 1886 ( Fig. 50.—Embryo Sac, before Fertilisation', in Three Stages of Development. A, B, and C—h, Helper Cells; a, Antipodal Cells, derived from Division of Original Cell Nucleus ; pn, Polar Nuclei ; dn, Definitive Nucleus ; , Embryonal Vesicle. sap cavity, called a vacuole, being formed. These nuclei, now stationed at the upper and lower ex- t

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Archive image from page 280 of Bees & bee-keeping; scientific and. Bees & bee-keeping; scientific and practical. A complete treatise on the anatomy, physiology, floral relations, and profitable management of the hive bee CUbiodiversity1154323 Year: 1886 ( Fig. 50.—Embryo Sac, before Fertilisation', in Three Stages of Development. A, B, and C—h, Helper Cells; a, Antipodal Cells, derived from Division of Original Cell Nucleus ; pn, Polar Nuclei ; dn, Definitive Nucleus ; , Embryonal Vesicle. sap cavity, called a vacuole, being formed. These nuclei, now stationed at the upper and lower ex- tremities of the embryo sac, twice divide into two, The life of the cell inheres in its protoplasm. When this separates and gives place to cell sap, the spot occupied by the cell sap is called a vacuole.

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