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In which regions did cities first begin to emerge over 5000 years ago?

AThe rainforests of South America

BThe desert regions of Asia and Africa

CThe plains of North America

DThe islands of the Pacific Ocean

Answer:

B. The desert regions of Asia and Africa

Read Explanation:

  • Cities began to emerge in the desert regions of Asia and Africa more than 5000 years ago.

  • Most of them were located on the margins of deserts rather than in the centre of them.

  • Cities such as Cairo, Damascus and Baghdad served as centres of administration, education, religion, commercial activity and transportation


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Identify the correct statement regarding UNESCO's definition of grassland.

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  2. According to UNESCO, grassland must have more than 10 percent trees and shrub cover.
  3. UNESCO's definition of grassland is identical to FAO's definition of forest.

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    1. Oasis
    2. Wadis
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      Choose the correct statements concerning autotrophs in an ecosystem.

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      2. Photosynthetic plants, possessing chlorophyll, synthesize high-energy organic compounds using sunlight.
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