After analyzing the hybridization data, the scientists found that only 30 percent of the approximately 500 plant species they surveyed are able to produce fertile hybrids when mated with other species. By stark contrast, 61 percent of animal species surveyed are able to reproduce successfully with o...
One thing included in the definition of a living thing is that it must be able to reproduce. However, mules can't reproduce. Why would we include reproduction in the definition of a living thing? Why have most living organisms adapted to brea...