write a note fertilization and embryo development
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Embryo and embryonic development. The term embryo applies to the earliest form of life, produced when an egg (female reproductive cell) isfertilized by a sperm (male reproductive cell; semen). Thefertilized egg is called a zygote. Shortly after fertilization, the zygote begins to grow and develop.
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After fertilization, the zygote divides several times to form an embryo within the ovule. The ovule develops a tough coat and is gradually converted into a seed.
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