The correct answer is A. Each era.....
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Answer:
People with type O- blood are called universal donors because their donated red blood cells have no A, B or Rh antigens and can therefore be safely given to people of any blood group. ... Their plasma does not contain A or B antibodies and can be transfused safely to all blood types.
They thought that the solar system we live in was the whole universe. So when they referred to the universe, they really meant only our solar system. Galileo did not agree that our universe is geocentric, or that everything revolves around Earth.
Answer:
The North European Plain
Explanation:
The North European plain is the most populated region of the four mentioned in the question.
This was not always the case, and until the Middle Ages, the North European Plain was sparsely populated. However, ever since, its population has been growing, because despite having a climate that is wet and cool the majority of the year, the soil is very fertile, and the lack of physical geographical barriers makes it easier for human dwelling.
Under the Gupta dynasty, Indian civilization grew.
