They evolved in different directions; such is the way of the natural selection experiments. (religion.blogs.cnn.com)
The study, which combined genetic analysis with a 19 - year - long selection experiment, supports the idea that the mechanisms of adaptive evolution may be more predictable than previously suspected. (sciencedaily.com)
Affinity selection experiments revealed that spliceosomes lacking U1 snRNA formed in the U1 snRNP - depleted reactions reconstituted with SR proteins. (science.sciencemag.org)