Answer:
There are four main ethnic groups living in the Middle East. The Arabs are the largest, making up 75% of the region's population. Their ancestors were tribal members from the Arabian peninsula. The Persians reside mainly in Iran; their ancestors came to the region from Central Asia. The Kurds live in a rural, mountainous area between Iraq and Turkey. Many of them make a living as farmers or herders. Like the Persians, the Turks also have ancestors from Central Asia. This group lives in Turkey.
Explanation:
Answer:
Rivers provide water, and a transportation route (before roads and railroads). They can also form a natural boundary or barrier to protect or defend people. Rivers can provide fish and can also make the lands around them very fertile. if they overflow their banks occasionally.
Explanation:
When scientists discuss the great oxygenation event, they are referring to a time when the transition from the mildly reducing Archean atmosphere-ocean system to the oxygenated atmosphere and shallow oceans of the early Paleoproterozoic that started between ~2.4 and 2.3 Ga and ended between 2.1 and 2.0 Ga.
- here The Great Oxidation Event, also called the Great Oxygenation Event, the Oxygen Catastrophe, the Oxygen Revolution, and the Oxygen Crisis, was a time interval when the Earth's atmosphere and the shallow ocean first experienced a rise in the amount of oxygen.
- in this event Gradually, the accumulated oxygen started escaping into the atmosphere, where it reacted with methane. As more oxygen escaped, methane was eventually displaced, and oxygen became a major component of the atmosphere.
- The Great Oxygenation Event (GOE) was the creation of free oxygen in our atmosphere. It was caused by cyanobacteria doing photosynthesis
to know more about photosynthesis click here
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Explanation:
The Act 31 requirements were designed to provide Wisconsin's students with instruction in American Indian Studies because of its academic appropriateness and its potential to serve as a positive force with which to combat misunderstanding and social unrest.
