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Versions: Due to recombination and crossing over, sexual reproduction provides about variations in species. Variations are essential with the individuality and evolution of species. If a fertilized egg implants in the endometrial lining of your uterine wall, the embryo produces a hormone called human chorionic gonadotropin (hCG) that maintains the https://reproductioninbiology60504.ltfblog.com/21532227/everything-about-reproduction-furniture-yeovil

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