Can a bonsai tree be started with just a branch?

I hope that someone can help me. i want to start a bonsai tree and i've been told that i can do this by cutting off a small branch from a bush or a very young tree. is this true? please respond. thanks.|||i understand that you can use rooting powder to encourage the growth of roots on cuttings. the important thing though is that you have to have a smooth cut to work with. a jagged cut will just rot in water and also harms the tree you take it from. a great source of info is bonsaiplanet.com|||i have a dwarf pomegranate bonsai. it is nearly 10 years old. just a couple of months ago, i trimmed a few branches off of it and put them in water. it took nearly 3 weeks but, four of the small branches have grown nice roots and so i have planted them and they are doing very well in soil. so, i will say, based on my limited experience, that yes, you can grow a bonsai from a branch.