Multiple choice Which of the following is part of the egg-producing structure in plants? The microgametophyte in gymnosperms The anthridium of mosses The megagametophyte of angiosperms The plasmodesmata of angiosperms Reveal answer Fill a bubble to check yourself C Correct answer Explanation The megagametophyte produces the egg cell for fertilization. After fertilization, the ovule develops into a seed. It is also called embryo sac in flowering plants.