Answer:
A "seniority system" is an employment system that allots to employees rights and benefits according to the length of their employment. The principal feature of all seniority systems is time.
Explanation:
As the electorate expanded, the political parties evolved to mobilize the growing mass of voters as the means of political control. Political parties became institutionalized to accomplish this essential task.
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Answer: Most of Arabia was under Muslim control by the time Muhammad died. After his death, later caliphs unified Arabia and expanded Islamic territory across the Middle East and North Africa. The fourth caliph was Muhammad´s son-in-law, Ali. After his death, Sunnis and shi´ah split in a dispute over who should be the next caliph.
The Roman population grew quickly, thanks to surplus production of grains, olives and other crops. The extra population later helped Rome's military expansion by providing a large supply of troops. The surplus also helped Rome to establish trade ties with other Mediterranean powers, enhancing the city's economic might.
