← Reproduction of Seed Plants Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All Pollen Cones Produce the male Gametophytes. Pollen Grains Male Gametophyte. Seed Cones Produce Female Gametophytes. Ovule Structure in seed cone in which female gameteophytes develop. Pollen Tube Structure grown by a pollen grain; contains two haploid sperm nuclei. Sepals Outermost circle of a flower that encloses a bud before it opens and protects the flower while it is developing. Petals Brightly-coloured structure just inside the sepals; attracts insects and other pollinators to the flower. Stamen Male part of the flower; made up of an anther and a filament. Filament A long thin structure that supports an anther. Anther Flower structure in which haploid male gametophytes are produced. Carpels Innermost part of the flower that produces the female gametophyte. Ovary A flower structure that contains one or more ovules from which female gametophytes are produced. Style Narrow stalk of the carpel in a flower. Stigma Sticky portion at the top of the style where pollen grains frequently land. Embryo Early developmental stage of a sporophyte plant. Endosperm Food-rich tissue that nourishes a seedling as it grows. Gametophyte Haploid, or gamete producing, phase of an organism. Sporophyte Diploid, or spore producing, phase of an organism. Bryophytes Nonvascula plant; some examples are mosses and their relatives. Angiosperm Flowering plant. Gymnosperm Seed plants that bears its seeds directly on the surface of cones.