Megagametogenesis produces a female gametophyte with which composition?

1. In megagametogenesis the surviving haploid megaspore undergoes mitosis. 2. The product is an eight nucleate, seven cell female gametophyte, also called the megagametophyte or embryo sac. 3. The count differs because two of the nuclei, the polar nuclei, move to the equator and fuse in a single central cell. 4. That leaves eight nuclei distributed among seven cells rather than eight. 5. Three nuclei sit opposite the micropyle and become the antipodal cells, which later degenerate. 6. The nucleus closest to the micropyle becomes the egg, and the two beside it become the synergids. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 32 "Plant Reproduction", section 32.1 Reproductive Development and Structure_