Epigenetics in action? (Introduction)
http://phys.org/news/2012-09-similar-life-extreme-differently.html- Extremophiles with two different approaches to the same problem. Too much uranium. Very closely related.
Epigenetics in action?
by David Turell, (5143 days ago) @ David Turell
These fruit flies can only use one cactus for food, since they lack an enzyme to convert cholesterol.-http://phys.org/news/2012-09-biologists-species-fruit-cactus.html