The most common are by taking cuttings and rooting them (usually with the aid of a rooting hormone), and grafting (which is more involved, and more difficult to do.)
Google "plant propagation techniques"
A couple of sites with good info that I've used are:
http://www.rainyside.com/archives/cuttings.html
http://gardening.about.com/od/gardenprimer/ss/Cuttings.htm
www.plantpropagation.com
it is the way plants reproduce asexually
cutting,layering and marcotting
sexual and asexual
1. Vegetative propagation 2. Sexual reproduction and 3. Asexual reproduction
The three main methods would be:rooting cuttings- simply cutting plant bits and giving the right conditions to grow rootsgrafting- common in trees but used with soft tissue plants as welltissue culture- growing plantlets from petri dish cultures, used mostly to ensure virus free plants
Grafting and budding..
Grafting, budding etc. Rooting and cutting are methods of propagation.
artificial insemination
One advantage to using an artificial method of family planning is that they are usually pretty reliable. A disadvantage to these methods are possible side effects.
they are: sexual propagation & asexual proagation.
There is 3. Invitro, Artificial Insamination, and Normal
Polonium can be obtained by artificial methods. It is not renewable.
there is nothing like natural methods of asexual reproduction...from the term asexual, it means artificial