Two units (equivalent to two years or four semesters) of laboratory science are required (three units are strongly recommended), providing fundamental knowledge in two of the following disciplines: 1  Biology. 2  Chemistry. 3  Physics.
Slave forts were established all along the coast of West Africa, to house captured Africans in holding pens (barracoons) awaiting transport. They were equipped with up to a hundred guns and cannons to defend European interests on the coast, by keeping competitors at bay. There were approximately 80 castles dotted along the slave-trading coast.
Historically in the context of slave societies of the Americas, a quadroon or quarteron was a mixed-race person with one quarter African and three quarters European ancestry (or in the context of Australia, one quarter aboriginal ancestry). Similar classifications were octoroon for one eighth black and hexadecaroon for one sixteenth black.