Male gametophyte in stamen. Female gametophyte in ovule. . Sporopollenin 3. Parthenocarpic 4. 27 Chromosome.. Vallisnaria . Stores food 7. 7 Cells 8. 3 (three) Antipodal cells 9. Two celled stage Vegetative cell and a generative cell. Megasporangium. Parthenium (Carrot grass) . Pea and Ground nut . Rice and Maize. . In some seeds like black pepper and beet remnants of nucellus are also persistent. This residual persistant nucellus is the perisperm.. Special mechanism to produce seed without fertilisation. Occurrence of more than one embryo in a seed.
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