1 Why the test is used: Between 75% and 90% of people with lupus have a positive anti-dsDNA test. 2  Also, the test is very specific for lupus. 3  Therefore, a positive test can be useful in confirming a diagnosis. 4  For many people, the titer, or level, of the antibodies rises as the disease becomes more active.
The zone below ground where the pore spaces are filled with ground water is called the saturated zone. Above the saturated zone, where the pore spaces are not filled with ground water, is the unsaturated zone. The water table marks the boundary between the saturated and unsaturated zone. The water table intersects Earth's surface at rivers and at lakes.
For the most part, the amount of water on Earth stays the same. The only way for the amount of Earth's water to increase would be for it to come from outer space. Not coincidentally, this is precisely what happens. Comets, made of dust and ice, enter the Earth's atmosphere and melt from the friction of the air as it plummets towards Earth's surface.