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An event found only in the life cycle of flowering plants. It is the fusing of the sperm cell with the two nuclei of the gametophyte's central cell to form the cell that will become the endosperm of the seed.

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Category: Human evolution
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Conception; the process of sexual reproduction by which the chromosomes from a sperm cell enter the nucleus of an ovum and combine with its chromosomes to create a zygote.

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Процесот на спојување на спермата на мажот и јајце клетката на женката (јајце).

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In twofold degree or extent.

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Adding an extra shot of espresso to a drink that ordinarily only comes with one shot.

фосил

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Preserved remains of once-living plants or animals in which the replacement of organic or inorganic materials bysoil minerals has begun. Naturally occurring casts are also ...

развој

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The process of regulated growth that results from the interaction of the genome with cytoplasm and the environment. It involves a programmed sequence of phenotypic events that are ...