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.
Background: The intertidal zone is the area where land and sea meet. This habitat is covered with water at high tide, and exposed to air at low tide. The land in this zone can be rocky, sandy or covered in mudflats. The intertidal zone is divided into several zones, starting near dry land with the splash zone, an area that is usually dry, and moving down to the littoral zone, which is usually underwater.