Heroin use has increased a staggering 63 percent over the last 10 years in the United States—an increase made all the worse by the growing abuse of prescription opioids such as oxycodone (Percocet), hydrocodone (Vicodin), and codeine. An alarming 45 percent of Americans addicted to heroin are also addicted to prescription opioids.
parasites might be a factor that selected for sexuality in their hosts, but that hosts can somehow “sense” that they’re infected, and produce more genetically diverse offspring.
This is a good summary: Since I started this website, I’ve written many posts on epigenetics, a term that now refers to modification of the nucleotide base composition of DNA by the environment or by other genes. Such modification—usually involving attachment of methyl groups to two of the four bases that make up DNA—may have significant effects on the organism, […]