Scuba divers often visit a coral reef off the coast of south central america. there has been a great increase in tourism and diving in this area. which best describes the effect this will have on the reef.

divers will have the opportunity to see many fish.
reef fish may be concerned about the presence of divers.
divers may damage the coral by kicking, touching, or standing on it.
more fish species will live in the area.

In a cladogram' when does a group of organisms branch off

How is the carbon cycle related to global warming ?

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).