卵子的英文
卵子的英文: Of, relating to, or being a twin developed from two separately fertilized ova; dizygotic. Two or more ova are shed during the same heat period. The formation,development,and maturation of an ovum. Parthenogenesis in which the egg is activated by sperm,but without fusion of the egg and sperm nuclei. " But, in fact, these are just a few reproductive cells, not much different than eggs or sperm In human reproduction, one female egg is usually fertilized by one sperm. The entity formed by the union of the male sperm and the female ovum;an embryo or a zygote. Jellyfish reproduce by releasing eggs and sperm into the sea. The haploid nucleus of a sperm or egg before fusion of the nuclei in fertilization. Cloning might not be used as widely by gay males, because they would need to find an egg donor and a surrogate mother. n. 卵子;胚珠;小卵 A stalk connecting an ovule or a seed with the placenta. The ovule - bearing lower part of a pistil that ripens into a fruit. Having an ovule partially inverted and curved such that the micropyle nearly meets the funiculus. The occurrence of more than one embryo in the ovule denotes polyembryony Seed development in most instances commences following fertilization of the ovule. n. 卵,卵子,卵形装饰 The formation,development,and maturation of an ovum. A cavity in the ovary containing a maturing ovum surrounded by its encasing cells. Derived from a single fertilized ovum or embryonic cell mass.Used especially of identical twins. A pore in the membrane covering the ovum of some animals through which a spermatozoon can enter. The outermost layer of cells of the blastocyst that attaches the fertilized ovum to the uterine wall and serves as a nutritive pathway for the embryo. |