The core of the histones H2A and H2B can also be modified. Combinations of modifications are thought to constitute a code, the so-called histone code. Histone modifications act in diverse biological processes such as gene regulation, DNA repair, chromosome condensation (mitosis) and spermatogenesis (meiosis).
Bread and Circuses. Bread and circuses became the method that the ruling class of ancient Rome used to maintain their power and control of the people. This method kept their sheep fat and happy, even as they fleeced them and sent them off to plunder the free world.
Slavery and Slaves in Ancient Rome. Slaves were an important social class in ancient Rome. The lot in life of a slave was generally poor, but it could range from being a public slave in a mine -- death sentence -- to what amounts to a maid. Slaves could also earn their freedom. Few wrote about slavery as inherently evil.