What are the periods of ontogenesis of angiosperms? Using an example of a plant, describe the processes occurring during these periods.

I) Embryonic – the period of the formation of the embryo and seed. Ripened seed goes into a dormant state
II. Juvenile stage (youth) – from seed germination to the beginning of the laying of the first flowers. At this stage, only vegetative organs are formed in plants: leaves, stems, roots. In annual herbs, this period can last several weeks, in woody plants – up to several tens of years. During this period, only vegetative organs are formed in plants. Juvenile plants are characterized by: maximum activity of all physiological processes, maximum increase in vegetative mass; high ability to root formation; some plants have a special leaf shape.
III. Maturity and reproduction (fruiting) – the maturity stage starts from
the moment of laying the buds of flowers before fertilization (the emergence of new embryos) The reproduction period is from fertilization to the full ripening of seeds and fruits. During this period, the formation of vegetative reproductive organs (tubers, bulbs, etc.) occurs.
VI) Reproduction – from the first fertilization to the formation of fruits and seeds.
V) Aging and dying – from the complete cessation of fruiting to the dying of vegetative organs and the death of the organism itself.

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