Many plant species use their ability for vegetative propagation in their normal pattern of development (see vegetative propagation). The production of these vegetative propagules, as with the production of seed, is to increase numbers and provide a means by which the plant survives adverse conditions. The energy storage for this purpose makes them attractive as food for us, e.g. potatoes, onions, carrots.
All vegetative propagation is a form of division that has been exploited by mankind for a very long time. In many cases little more than breaking up the plant or taking the natural propagules is involved.
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