Scientists have revealed that gene regulation by histones is one of the major effects of evolutionary diversity in organisms ranging from the sponge to humans. The regulation of genes is controlled by the histones that wrap the DNA inside the nucleus. These histones determine whether or not a gene is going to be turned on or off. At the University of Queensland in Australia, a study consisted of Great Barrier Reef sponges and genetic testing was preformed on the histones to see if the genetic marks are the same as in more complex organisms. The common ancestor for the sponge and human is long extinct, but this connection determines that this genetic component is important for evolution and diversity amongst simple to complex organisms.
In my opinion, this study is important to understanding evolutionary drives in ecosystems. Finding a common link in gene expression between two very different organisms is a large step for evolutionary science.