Answer:
A. They defended Allied bombers despite being segregated by the U.S. Military
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When a plant has been without water for a long time, the central vacuoles lose water, the cells lose shape, and the whole leaf wilts. Plants often store sugars, ions, some proteins and occasionally pigments inside the vacuole.
Climatic condition was the major factor for migrating to new places.
The answer to the item that you posted is letter A. The Olduvai Gorge in Tanzania is the site of many findings of the earliest humans. It is also one of the important sites to which many had learning and understanding about the human evolution.