Mining activities can acquire minerals like coal, which provide energy. however, mining activities are also harmful for the environment. the table below shows the number of major sinkholes formed in a mining location from 1990 to 1998. years number of sinkholes 1990 15 1992 18 1994 20 1996 58 1998 78 based on the table, which of these is the most likely year when mining operations were started in the location? (2 points) between 1990 and 1992 between 1992 and 1994 between 1994 and 1996 between 1996 and 1998

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16

Aplant may open end close its stomata to prevent excess water loss and maintain

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).