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.
3. Caligula captured the obelisk that stands in St. Peterâs Square. Roman Emperor Caligula built a small circus in his motherâs gardens at the base of Vatican Hill where charioteers trained and where Nero is thought to have martyred the Christians. To crown the center of the amphitheater, Caligula had his forces transport from Egypt a pylon that had originally stood in Heliopolis.