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Africa

Back to Africa: A.D. 801 to 900

Northeast africa

The off-shore islands of Ethiopia thrived on the export of Abyssinian slaves. Some apparently escaped to settle in Danakil and Somali, there to intermarry and become converted to Islam. Inland royal power was assumed in the mountain region of Lasta sometime after A.D. 940 by a non-Semitic Zagwe Dynasty. While these people became Christianized, Semitic farmers expanded southward along the forested spine of Ethiopia to modern Addis Ababa. At the same time Sidama tribesmen invaded from south and east. (Ref. 83 , 270 )

In 905 the Turkish Tulunid Dynasty of Egypt gave way to the Ikhshidids who, in turn, were again subject to the Abbasid caliphate of Damascus although this domination was short lived as the empire began to split. At the end of the century the Fatimids moved in from northwestern Africa to take control of Egypt. They were a branch of the Isma'ilites, claiming descent from Mohammed's daughter, Fatima. Sugar cane was now grown in Egypt, with the sugar produced by an advanced process. (Ref. 137 , 260 )

North central and northwest africa

We noted in the last chapter that the Aghlabid Dynasty had fallen to the Berbers. In this century these victors welcomed Ubaid Allah, a Shi'ite "Mahdi"

"Mahdi" is a Moslem title of an expected spiritual and temporal ruler destined to reign righteously over the world
from Syria, who used the Berber armies to establish a new north African, Fatimid Dynasty. They destroyed Tahert and dominated Fez, eventually establishing their capital in Cairo as they assumed control in Egypt. (Ref. 83 ) The Moroccan Idrisids resisted for some time, but with the Spanish Omayyids attacking also from the north, the Moroccans finally fell to the Fatimids. (Ref. 137 ) As the Berbers expanded northward in Morocco and the Arabs came westward along the coast, there was a shift in the balance between the sedentary cultivators and the nomadic pastoralists. Nevertheless, Morocco, Algiers and Tunisia had a renewed prosperity with the establishment of great trade routes across the Sahara and increased commerce with Spain. In the desert, itself, however, cruel famines were suffered by small towns and warfare contributed further to their demise. (Ref. 8 , 176 )

Subsaharan africa

By the end of this century most of Africa was out of the Stone Age. (Ref. 83 ) It was the time of the apogee of the Kingdom of Ghana with its capital at Kumbi and extending from near the Atlantic coast almost to Timbuktu. It was essentially Negro, consisting of a group of federated tribes with a fairly well developed culture. Writing of the wealth and wisdom of this African kingdom, the Moslem Ibn Hawqal said that Ghana boasted that its people had hoards of gold and "the wealthiest of all kings on the face of the earth"

Quotation from historical map of the National Geographic Society, (Ref. 154 )
. The recently excavated city of Jenne-jeno reached the height of its development and by the end of the century may have had close to 20,000 people. This and satellite communities had penetrated the marketplace of North Africa. Goods, produce and gold flowed north via river and caravan while Saharan salt and Mediterranean glass beads came south. (Ref. 268 )

Pressure from the Berbers now forced the city-states of Chad to unite into a kingdom called Kanem-Bornu, or the Kanuri Empire, founded by a desert people and having the longest surviving dynasty in history, not being overthrown until the 19th century. A trans-Saharan slave trade running from west Africa east to the Arabs began in this century and lasted for hundreds of years. (Ref. 175 , 8 , 213 ) The Arabs began to colonize the east coast as far south as Zanzibar but never reached or knew of Madagascar, in this century. (Ref. 137 ) Ancestors of present day Kikuyu tribes migrated into Kenya from the south. They were Bantu-speakers who were in the process of spreading out from the Congo in the transition period from Stone Age hunting to the Iron Age and agriculture. (Ref. 175 , 8 ) Zimbabwe continued to be occupied by the Shona people who traded in copper and gold.

Forward to Africa: A.D. 1001 to 1100

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Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
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Prevent foreign microbes to the host
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they provide healthier benefits to their hosts
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They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
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cell is the smallest unit of life
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cell is the structural and functional unit of life
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Binomial nomenclature
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Source:  OpenStax, A comprehensive outline of world history. OpenStax CNX. Nov 30, 2009 Download for free at http://cnx.org/content/col10595/1.3
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