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Answer: The four nitrogen bases found in DNA are adenine, cytosine, guanine, and thymine
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Wind has ability to carry some sediment in it. during strong winds the sediments carried can rubbed against the rock eroding some of its softest part. this process is referred to as abrasion. wind erosion is common in regions of the world where strong winds are experienced such as desert.
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Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve
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