Interpret the chromosome model. A circle containing ten blue sausage-shaped forms of varied lengths, with colored bands at one or both ends. Two are tiny with a yellow band near the bottom. Two are very small with a red band near the top and a dark-blue band near the bottom. Two are small with a green band near the bottom. Two are medium-length with a black band near each end. Two are long with one pink and one purple band near the top, and a gray band near the bottom. Drag "True" or "False" to the end of each statement.

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).

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d

Why do you suppose the structural polysaccharide cellulose does not contain branches?