Do all living things come from two organisms?

All known surviving living things come from a single common ancestor. This common ancestor was not the first life form on earth, nor was it the only organism on the planet at the time it existed. It was part of a biosphere of many organisms, all descended from earlier common ancestors, but none of the other organisms alive at that time have descendants still alive today. read more

scientists have idntified more than 1 million kinds of organisms, scientists are still finding new kinds of organisms never seen before, to study such a great number of organisms they had to be organized in a way that made scence. read more

In asexual reproduction, a living thing can reproduce without receiving any cells from another living thing. All chromosomes come from one parent causing the offspring to be similar or identical in genetic structure. Organisms that produce asexually include but are not limited to bacteria, molds, yeast and some plants. read more