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Fertilization

Not to be confused with Fertilizer, used to help plants grow
Human sperm arrives at the egg cell.
Liverworts are a kind of small plant with a complex life cycle that includes fertilization. The sperm and the egg come together to make a zygote. The zygote grows into an embryo.

Fertilization (British English spelling: fertilisation) is when a male's sperm enters a female's ovum (or "egg"). Fertilization is also called conception. Biologists call a fertilized egg a zygote. A zygote grows into an embryo.

Fertilization occurs in animals, including humans and birds, in plants, fungi, protists, in fact all eukaryotes. Fertilization makes a cell with twice as many chromosomes. The eukaryote life cycle includes meiosis which divides the chromosome number in half.

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